1. Find the area of the shaded region.
-- 30 cm -
(a) 21 cm
30 cm
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Answer:
81 cm is shaded reagion
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Answer:
area of shaded region = area of rectangle - area of semicircle.
Step-by-step explanation:
area of rectangle = L×B
= 30× 21
= 630 cm sq.
area of semicircle = π×r×r/2
= ( 22/7×21/2×21/2 ) /2
= ( 11/7×21×21/2 ) /2
= ( 11/7×21×21/2 ) ×2/1
= 11/7×21×21/2×2
=. 11/7×21×21
=. 11×3×21
=. 33×21
=. 693 cm sq.
area of shaded region = 63 cm sq.
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