Question

Find the area of a semicirde when it

i-radius is 21 cm ii-radius is 35cm.

iii-diameter is 7m iv- diameter is 2.8cm.
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Answer 1

Answer:

(I) 693 cm^2 (ii) 1925 cm^2 (iii) 19.25 m^2 (IV) 3.08 cm^2

Step-by-step explanation:

for the area of semi-circle = πr^2/2

(I) for r = 21 cm

area = 693 cm^2

(ii) for r = 35 cm

area = 1925 cm^2

(iii) for d = 7 m

r = 3.5 m

area = 19.25 m^2

(iv) for d = 2.8 cm

r = 1.4 cm

area = 3.08 cm^2