Math 2022 Question 38
Question
An isosceles triangle is drawn on the 1 cm grid below/ Six identical circles partially cover the triangle. Each circle is divided into four equal parts. The area of the shaded fraction shown in the circle 2 cm2 .
Answer
52 cm2
Explanation
1/4 of the circle = 2cm cubed.
Therefore the area of 1 circle is 4×2 = 8
There are 6 circles. The area of all 6 circles is 8 x 6 = 48
Area of the triangle is bxh÷2 = 10×20÷2 = 100
Therefore the area not covered by circles is 100-48 = 52
