Math Problem Statement

What is the area of this L-shaped figure?

Solution

The figure in the image is an L-shaped polygon, and we can find the area by breaking it into two rectangles. Here's how we can do it:

Step 1: Divide the figure into two rectangles.

  • Rectangle 1: The top horizontal part of the L-shape.

    • Width: 8cm8 \, \text{cm}
    • Height: 2cm2 \, \text{cm}
    • Area of Rectangle 1: 8×2=16cm28 \times 2 = 16 \, \text{cm}^2
  • Rectangle 2: The vertical part of the L-shape.

    • Width: 2cm2 \, \text{cm} (same as the width of the lower vertical strip)
    • Height: 8cm8 \, \text{cm} (but part of it is cut out by Rectangle 1)
    • Height to consider: 8cm2cm=6cm8 \, \text{cm} - 2 \, \text{cm} = 6 \, \text{cm}
    • Area of Rectangle 2: 6×6=36cm26 \times 6 = 36 \, \text{cm}^2

Step 2: Add the areas of both rectangles.

  • Total area = 16+36=52cm216 + 36 = 52 \, \text{cm}^2

Thus, the area of the figure is 52 square centimeters.

Would you like more details or have any questions?


Here are five related questions to expand your understanding:

  1. How would the area change if the height of the vertical section was increased by 2 cm?
  2. Can you calculate the perimeter of this L-shaped figure?
  3. How can the area be calculated if the L-shape was rotated by 90 degrees?
  4. What is the formula for the area of a composite shape like this?
  5. How would you calculate the area if the shape were not rectangular but had slanted sides?

Tip: When dealing with composite shapes, breaking them into smaller rectangles or known shapes makes calculating areas much simpler.

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Math Problem Analysis

Mathematical Concepts

Geometry
Area of Composite Shapes

Formulas

Area of a Rectangle = Length × Width

Theorems

Decomposition of Composite Figures

Suitable Grade Level

Grades 5-7