Question

A diagram shows a square with a perimeter of 40cm. Work out the percentage of the area inside the square that is shaded.

Answer 1

Answer:

Step-by-step explanation:

10×10=100

3×10=30

6×10=60

15+30=45

100-45=55

55cm²

Answer 2

The percentage of the area inside the square that is shaded is 65%

What is an equation?

An equation is an expression that shows the relationship between two or more numbers and variables.

Let l represent the length of each square side, hence:

4l = 40

l = 10 cm

Area of square = 10 * 10 = 100 cm²

Area of triangle 1 = (1/2) * 10 * (10 - 5) = 25 cm²

Area of triangle 2 = (1/2) * 10 * (10 - 8) = 10 cm²

Area of shaded portion = 100 - (25 + 10) = 65 cm²

Percentage of shade portion = (65 cm² / 100 cm²) * 100% = 65%

The percentage of the area inside the square that is shaded is 65%.

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