Question

Find the area and the perimeter of a quadrant of a circle with radius 4m correct to 3 significant figures

Answer 1

area of a quarter circle = 1/4 * pi * r^2

= 1/4 * pi * 4^2 = 12.6 m to 3 sig figs.

perimeter = 4 + 4 + 1/4 * 2 pi * 4 = 14.3 to 3 sig figs.