Area of Square Practice Problems and Solutions

Master square area calculations with step-by-step practice problems. Learn the formula A = a² and solve real-world area problems with detailed solutions.

📚Master Square Area Calculations with Interactive Practice
  • Apply the formula A = a² to calculate square areas accurately
  • Solve problems using diagonal method: (diagonal × diagonal) ÷ 2
  • Convert between square units: cm², m², and other measurements
  • Calculate areas of squares in real-world contexts like rooms and plots
  • Practice with both whole numbers and decimal side lengths
  • Verify answers using multiple calculation methods

Understanding Area

Complete explanation with examples

In this article, we will learn what area is, and understand how it is calculated for each shape, in the most practical and simple way there is.
Shall we start?

What is the area?

Area is the definition of the size of something. In mathematics, which is precisely what interests us now, it refers to the size of some figure.
In everyday life, you have surely heard about area in relation to the surface of an apartment, plot of land, etc.
In fact, when they ask what the surface area of your apartment is, they are asking about its size and, instead of answering with words like "big" or "small" we can calculate its area and express it with units of measure. In this way, we can compare different sizes.

Units of measurement of area

Large areas such as apartments are usually measured in meters, therefore, the unit of measurement will be m2 m^2 square meter.
On the other hand, smaller figures are generally measured in centimeters, that is, the unit of measurement for the area will be cm2 cm^2 square centimeter.
Remember:
Units of measurement for the area in cm=>cm2 cm => cm^2
Units of measurement for the area m=>m2 m=>m^2

Detailed explanation

Practice Area

Test your knowledge with 168 quizzes

ABCD is a rectangle.

Given in cm:

AB = 7

BC = 5

Calculate the area of the rectangle.

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Examples with solutions for Area

Step-by-step solutions included
Exercise #1

AB = 10 cm

The height of the rectangle is 5 cm.

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Calculate the area of the parallelogram.

Step-by-Step Solution

To solve this problem, we'll apply the formula for the area of a parallelogram:

  • Step 1: Identify the base and the height from the given information.
  • Step 2: Use the formula for the area of a parallelogram: A=base×height A = \text{base} \times \text{height} .
  • Step 3: Calculate the area using the given values.

Let's proceed with the solution:
Step 1: The given base AB AB is 10 cm, and the height is 5 cm.
Step 2: The formula for the area of a parallelogram is A=base×height A = \text{base} \times \text{height} .
Step 3: Substituting the provided values, we get:
A=10cm×5cm A = 10 \, \text{cm} \times 5 \, \text{cm}
A=50cm2 A = 50 \, \text{cm}^2

Therefore, the area of the parallelogram is 50cm2 50 \, \text{cm}^2 .

Answer:

50

Video Solution
Exercise #2

AB = 12 cm

The height of the rectangle is 4 cm.

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Calculate the area of the parallelogram.

Step-by-Step Solution

To solve this problem, we'll proceed as follows:

  • Step 1: Identify the given values for the base and the height of the parallelogram.
  • Step 2: Apply the formula for calculating the area of the parallelogram.
  • Step 3: Calculate the area using the values provided.

Let's perform each step:

Step 1: From the problem, we know:

  • The base AB AB of the parallelogram is 12cm 12 \, \text{cm} .
  • The height relative to the base is 4cm 4 \, \text{cm} .

Step 2: Use the formula for the area of a parallelogram:

Area=base×height\text{Area} = \text{base} \times \text{height}

Step 3: Plugging in the values of the base and height:

Area=12×4=48cm2\text{Area} = 12 \times 4 = 48 \, \text{cm}^2

Therefore, the area of the parallelogram is 48cm2 48 \, \text{cm}^2 .

Since this is a multiple-choice problem, the correct answer is Choice 2.

Answer:

48

Video Solution
Exercise #3

AB = 15 cm

The height of the rectangle is 6 cm.

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Calculate the area of the parallelogram.

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify the given base and height.
  • Step 2: Apply the formula for the area of a parallelogram.
  • Step 3: Calculate the area using the provided dimensions.

Now, let's work through each step:
Step 1: The base b b is equal to the length AB AB , which is 15 cm\text{15 cm}. The height h h corresponding to this base is 6 cm\text{6 cm}.
Step 2: We'll use the formula for the area of a parallelogram:
Area=b×h\text{Area} = b \times h.
Step 3: Plugging in our values, we have:
Area=15×6=90cm2\text{Area} = 15 \times 6 = 90 \, \text{cm}^2.

Therefore, the solution to the problem is Area=90cm2 \text{Area} = 90 \, \text{cm}^2 , which matches choice .

Answer:

90

Video Solution
Exercise #4

AB = 17 cm

The height of the rectangle is 8 cm.

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Calculate the area of the parallelogram.

Step-by-Step Solution

To solve this problem, we will calculate the area of the parallelogram using the given base and height dimensions.

  • Step 1: Identify the given parameters. The base of the parallelogram AB=17cm AB = 17 \, \text{cm} and the corresponding height is 8cm 8 \, \text{cm} .
  • Step 2: Apply the area formula for parallelograms: Area=base×height\text{Area} = \text{base} \times \text{height}.
  • Step 3: Substitute the given values into the formula: Area=17×8 \text{Area} = 17 \times 8 .

Calculating the product, we have:
Area=136cm2 \text{Area} = 136 \, \text{cm}^2 .

Therefore, the area of the parallelogram is 136cm2 136 \, \text{cm}^2 .

Answer:

136

Video Solution
Exercise #5

AB = 25 cm

The height of the rectangle is 13 cm.

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Calculate the area of the parallelogram.

Step-by-Step Solution

To calculate the area of the parallelogram, we'll use the formula for the area, which is the product of the base and the height.

  • Identify the base and height from the information given: The base AB AB is 25 cm and the height is 13 cm.
  • Apply the formula for the area: Area=Base×Height\text{Area} = \text{Base} \times \text{Height}.
  • Substitute the given values into the formula: Area=25×13\text{Area} = 25 \times 13.
  • Perform the multiplication: Area=325\text{Area} = 325 square centimeters.

Therefore, the area of the parallelogram is 325cm2 325 \, \text{cm}^2 .

This corresponds to choice 1: 325.

Answer:

325

Video Solution

Frequently Asked Questions

What is the formula for finding the area of a square?

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The area of a square is calculated using the formula A = a², where 'a' is the length of one side. You multiply the side length by itself since all sides of a square are equal.

How do you find square area using diagonals?

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You can calculate square area using diagonals with the formula: Area = (diagonal × diagonal) ÷ 2. This method is useful when you only know the diagonal length of the square.

What units are used for measuring square area?

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Square area is measured in square units such as: • cm² (square centimeters) for smaller areas • m² (square meters) for larger areas like rooms • ft² (square feet) in imperial measurements • km² (square kilometers) for very large areas

Why do we square the side length when calculating area?

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We square the side length because area measures two-dimensional space. Since a square has equal sides, we multiply length × width, which equals side × side = a².

How do you solve square area word problems step by step?

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1. Identify the given information (side length or diagonal) 2. Choose the appropriate formula (A = a² or diagonal method) 3. Substitute the values into the formula 4. Calculate the result 5. Include proper units in your answer

What's the difference between area and perimeter of a square?

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Area measures the space inside the square (A = a²) and uses square units like cm². Perimeter measures the distance around the square (P = 4a) and uses linear units like cm.

Can you find the side length if you know the square's area?

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Yes, if you know the area, you can find the side length using: side = √area. For example, if the area is 25 cm², then the side length is √25 = 5 cm.

How do you calculate area when the side length has decimals?

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Use the same formula A = a² with decimal numbers. For example, if the side is 3.5 cm, then Area = 3.5 × 3.5 = 12.25 cm². Always include the squared units in your answer.

More Area Questions

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Practice by Question Type

Ascertaining whether or not there are errors in the data A shape consisting of several shapes (requiring the same formula) A shape consisting of several shapes (requiring the same formula) Calculate The Missing Side based on the formula Calculating in two ways Calculation using percentages Calculation using the diagonal Extended distributive law Extended distributive law Finding Area based off Perimeter and Vice Versa Identifying and defining elements Identify the greater value Subtraction or addition to a larger shape Using congruence and similarity Using short multiplication formulas Verifying whether or not the formula is applicable Verifying whether or not the formula is applicable Worded problems Calculation using percentages Express using Finding Area based off Perimeter and Vice Versa Finding Area based off Perimeter and Vice Versa Increasing a specific element by addition of.....or multiplication by....... Opening parentheses Subtraction or addition to a larger shape Subtraction or addition to a larger shape Suggesting options for terms when the formula result is known Using congruence and similarity Using external height Using Pythagoras' theorem Using variables How many times does the shape fit inside of another shape? Increasing a specific element by addition of.....or multiplication by....... Using decimal fractions Using ratios for calculation Calculating parts of the circle Calculation using percentages Express using Subtraction or addition to a larger shape Using additional geometric shapes Using Pythagoras' theorem Calculating in two ways Finding Area based off Perimeter and Vice Versa How many times does the shape fit inside of another shape? Subtraction or addition to a larger shape Using Pythagoras' theorem Using Pythagoras' theorem Using Pythagoras' theorem Using short multiplication formulas Applying the formula Extended distributive law Verifying whether or not the formula is applicable Worded problems Using ratios for calculation Using ratios for calculation Using external height Using Pythagoras' theorem Using ratios for calculation Using ratios for calculation Using variables Applying the formula Calculate The Missing Side based on the formula Using additional geometric shapes Using Pythagoras' theorem Worded problems Calculate The Missing Side based on the formula Using ratios for calculation Identifying and defining elements Using additional geometric shapes Using Pythagoras' theorem Applying the formula True / false Using additional geometric shapes Using additional geometric shapes Using variables Using variables Finding Area based off Perimeter and Vice Versa Using additional geometric shapes Applying the formula Finding Area based off Perimeter and Vice Versa Using variables Applying the formula Calculate The Missing Side based on the formula Express using Finding Area based off Perimeter and Vice Versa Finding Area based off Perimeter and Vice Versa Calculate The Missing Side based on the formula Calculate The Missing Side based on the formula Applying the formula Calculate The Missing Side based on the formula Calculate The Missing Side based on the formula Using variables Applying the formula Applying the formula