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 according to the data in the diagram.

101010777AAABBBCCCDDDEEE

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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