Question

The diagram shows a square with perimeter 20cm

work out the percentage of the area shaded inside the square that is shaded

Answer 1

Answer:70%

Explanation:

Answer 2

70%

Explanation:

Finding each side :-

• 4a = 20m
• a = 5 m

Finding area of unshaded region :-

• A = 1/2 * b * h
• A = 1/2 * 1.5 * 5 cm²
• A = 2.5 * 1.5 cm²
• A = 3.75 cm²

• Total unshaded region = 2*3.75 = 7.5 cm²

Overall area :-

• A = a²
• A = (5cm)²
• A = 25m²

Finding percentage :-

• % = 25 - 7.5 / 25 * 100
• % = 17.5 * 4
• % = 70