PSLE The figure is formed by joining three quarter circles of radius 18 cm. Find the perimeter of the figure. Round your answer to the nearest whole number. Take π = 3.14
Diameter of the quarter circle
= 2 x 18
= 36 cm
Circumference of the quarter circle
=
14 x 3.14 x 36
= 28.26 cm
Circumference of 3 quarter circles
= 3 x 28.26
= 84.78 cm
Perimeter of the figure
= 84.78 + 6 x 18 - 4 x 5
= 84.78 + 108 - 20
= 172.78
≈ 173 cm
Answer(s): 173 cm