Calculate Parallelogram Area: 6cm Base and 2cm Height Problem

Parallelogram Area with Base and Height

AB = 6 cm

The height of the rectangle is 2 cm.

AAABBBDDDCCC62

Calculate the area of the parallelogram.

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Calculate the area of parallelogram ABCD
00:03 Opposite sides are equal in a parallelogram
00:13 We'll use the formula for calculating the area of a parallelogram
00:18 Side(CD) multiplied by height (H)
00:24 We'll substitute appropriate values and solve to find the area
00:32 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

AB = 6 cm

The height of the rectangle is 2 cm.

AAABBBDDDCCC62

Calculate the area of the parallelogram.

2

Step-by-step solution

To solve this problem, we'll calculate the area of the parallelogram using the following steps:

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

Now, let's perform these steps:

Step 1: The base ABAB is given as 6 cm, and the height perpendicular to this base is 2 cm.

Step 2: Using the formula for the area of a parallelogram, we have:

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

Step 3: Substituting the given values:

Area=6cm×2cm=12cm2\text{Area} = 6 \, \text{cm} \times 2 \, \text{cm} = 12 \, \text{cm}^2

Thus, the area of the parallelogram is 12 square centimeters.

The correct answer is choice 1: 12.

3

Final Answer

12

Key Points to Remember

Essential concepts to master this topic
  • Formula: Area equals base times perpendicular height
  • Calculation: 6cm×2cm=12cm2 6 \, \text{cm} \times 2 \, \text{cm} = 12 \, \text{cm}^2
  • Check: Height must be perpendicular to base, not slanted side length ✓

Common Mistakes

Avoid these frequent errors
  • Using slanted side length instead of height
    Don't use the length of side AD as the height = wrong calculation! The slanted side is longer than the perpendicular distance. Always use the perpendicular height (shown as the vertical dotted line in the diagram).

Practice Quiz

Test your knowledge with interactive questions

A parallelogram has a length equal to 6 cm and a height equal to 4.5 cm.

Calculate the area of the parallelogram.

6664.54.54.5

FAQ

Everything you need to know about this question

What's the difference between height and side length in a parallelogram?

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The height is the perpendicular distance between parallel sides, while the side length is the actual length of a slanted side. Always use height for area calculations!

Why can't I use the formula length × width like a rectangle?

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Parallelograms are slanted rectangles! You need the perpendicular height, not the slanted side. The formula is still base × height, but height must be perpendicular.

How do I identify the height in the diagram?

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Look for the dotted vertical line from the base to the opposite side. This shows the perpendicular distance, which is your height measurement.

Does it matter which side I choose as the base?

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No! You can use any side as the base, but you must use the height that's perpendicular to that chosen base. The area will be the same either way.

What units should my answer have?

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Since you're multiplying length × length, the area units are always squared units. In this problem: cm × cm = cm².

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