Calculate Parallelogram Area: Using Base 8 and Height 4

Area Formulas with Perpendicular Height

Given the parallelogram of the figure

What is your area?

888444AAABBBCCCDDDEEE

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find the area of the parallelogram
00:03 Opposite sides are equal in a parallelogram
00:21 Calculate the area of the parallelogram using height(AE) multiplied by side(DC)
00:31 Substitute appropriate values and solve to find the area
00:36 And this is the solution to the problem

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?

888444AAABBBCCCDDDEEE

2

Step-by-step solution

To solve the problem of finding the area of the parallelogram, we follow these steps:

  • Step 1: Identify the relevant dimensions from the figure.
  • Step 2: Apply the formula for the area of a parallelogram.
  • Step 3: Perform the multiplication to calculate the area.

Let's work through each step:

Step 1: From the problem description and figure, we have:

  • The base AB=8 AB = 8 cm.
  • The height DE=4 DE = 4 cm, which is perpendicular to the base AB AB .

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

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

Substituting the given values into the formula:

Area=8cm×4cm \text{Area} = 8 \, \text{cm} \times 4 \, \text{cm}

Step 3: Calculate:

Area=32cm2 \text{Area} = 32 \, \text{cm}^2

Therefore, the area of the parallelogram is 32cm2\mathbf{32 \, \text{cm}^2}.

3

Final Answer

32 32 cm².

Key Points to Remember

Essential concepts to master this topic
  • Formula: Area of parallelogram equals base times perpendicular height
  • Technique: Identify base = 8 and height = 4, then multiply: 8 × 4 = 32
  • Check: Verify height is perpendicular to base, not slanted side ✓

Common Mistakes

Avoid these frequent errors
  • Using slanted side instead of perpendicular height
    Don't multiply base by the slanted side length = wrong area! The slanted side is longer than the actual height. Always use the perpendicular distance from base to opposite side.

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 can't I use the slanted side for height?

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The slanted side is longer than the actual height! Area needs the perpendicular distance between parallel sides, not the diagonal measurement along the slant.

How do I identify the height in the diagram?

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Look for the perpendicular line (shown as a dashed vertical line with a right angle symbol). The height is always at a 90° angle to the base, not slanted.

What if I get different numbers for base and height?

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It doesn't matter which parallel side you choose as the base! Just make sure you use the corresponding perpendicular height for whichever base you pick.

Is this the same formula for rectangles?

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Yes! Rectangles are special parallelograms where all angles are 90°. The formula Area=base×height \text{Area} = \text{base} \times \text{height} works for both.

Why is my answer in square units?

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Area measures 2-dimensional space, so we always use square units like cm², m², or ft². You're measuring how many unit squares fit inside the shape!

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