Find the Parallelogram Area Using Base 3X and Height 4Y

Parallelogram Area with Algebraic Expressions

Given the parallelogram of the figure

What is your area?

3X3X3X4Y4Y4YAAABBBCCCDDDEEE

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Express the area of the parallelogram
00:03 Opposite sides are equal in a parallelogram
00:14 Now we'll use the formula to calculate the area of a parallelogram
00:18 Side(DC) multiplied by height (AE)
00:26 Let's substitute appropriate values and solve for the area
00:42 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

Given the parallelogram of the figure

What is your area?

3X3X3X4Y4Y4YAAABBBCCCDDDEEE

2

Step-by-step solution

To determine the area of the parallelogram, we follow these steps:

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

Let's perform each step:

Step 1: From the problem, the base of the parallelogram is given as 3X3X and the height as 4Y4Y.

Step 2: Use the formula for the area AA of a parallelogram: A=base×heightA = \text{base} \times \text{height}.

Step 3: Plug these expressions into the formula:
A=3X×4YA = 3X \times 4Y

Perform the multiplication:

A=34XY=12XYA = 3 \cdot 4 \cdot X \cdot Y = 12XY

Thus, the area of the parallelogram is 12XY12XY.

When comparing this result to the given answer choices, the correct choice is:

  • Choice 1: 12xy 12xy
3

Final Answer

12xy 12xy

Key Points to Remember

Essential concepts to master this topic
  • Formula: Area equals base times height for any parallelogram
  • Technique: Multiply coefficients first: 3×4=12 3 \times 4 = 12 , then variables
  • Check: Final answer 12XY 12XY has both variables multiplied together ✓

Common Mistakes

Avoid these frequent errors
  • Adding base and height instead of multiplying
    Don't calculate 3X + 4Y = 7(X + Y)! This gives perimeter-type thinking, not area. Area always requires multiplication of perpendicular dimensions. Always multiply base × height for parallelogram area.

Practice Quiz

Test your knowledge with interactive questions

Calculate the area of the parallelogram based on the data in the figure:

101010444

FAQ

Everything you need to know about this question

Why do we multiply 3X times 4Y instead of adding them?

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Area measures the space inside a shape, which requires multiplying length × width. Adding gives you a perimeter-like measurement, not the actual area coverage.

Does it matter which side I call the base?

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No! You can use either pair of parallel sides as base and height. The key requirement is that height must be perpendicular to your chosen base.

How do I multiply 3X times 4Y?

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Multiply the numbers first: 3×4=12 3 \times 4 = 12 , then multiply the variables: X×Y=XY X \times Y = XY . Combined result: 12XY 12XY .

What if X and Y have specific values?

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The area formula 12XY 12XY works for any values of X and Y. Just substitute the numbers and calculate: if X=2 and Y=3, then area = 12(2)(3)=72 12(2)(3) = 72 .

Is this the same as rectangle area?

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Yes! Parallelograms and rectangles use the same area formula: base × height. The difference is that rectangles have right angles, while parallelograms can be slanted.

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