Find the area of the following circle. ( = 3.14; round answer to the nearest whole number. circumference = 120 cm. (hint: find r from c = 2r (round r to tenths; then find area. 1146 square cm is the area of a circle with 120cm circumference. solution: a=pir^2; c=120cm; c=2pir; r=c / (2pi; r=19.1cm a=3.14*19.1^2; a=1145.5 round to nearest whole number a=1146square cm

Question

Lilian West

Mathematics

9 April, 17:59

Find the area of the following circle. ( = 3.14; round answer to the nearest whole number. circumference = 120 cm. (hint: find r from c = 2r (round r to tenths; then find area. 1146 square cm is the area of a circle with 120cm circumference. solution: a=pir^2; c=120cm; c=2pir; r=c / (2pi; r=19.1cm a=3.14*19.1^2; a=1145.5 round to nearest whole number a=1146square cm

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Answers (1)

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Malik Berry · Answer 1

Circumference = 120

PI * d = 120

radius = circumference / 2 * PI

radius = 120 / 2*pi

radius = 19.098593171

Area = PI * radius^2

Area = 3.14 * 19.098593171 * 19.098593171

Area = 1,145.34

Area = 1,145