Question

EXERCISE 19.1
1. Find the area and the circumference of
the circle.
a. r = 14 cm b. d= 21 cm
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Answer 1

Answer:

a. area= 22/7×14×14=22×2×14=22×28=616 cm square

circumference=2×22/7×14

2×22×2=88cm

b. area=22/7×21/2×21/2=346.5 cm square

circumference=2×22/7×21/2=22×3=66cm