Question

The adjacent figure consists of four small semi-circles of equal radii and two big semi-circles of equal radii (each 42cm).Find the area of shaded region.​

Answer 1

Hey guys here your answer

Given big semi circles radius =42 cm

small semi circles radius=42/2=21 cm

let 1, 2, 3, 4 are shaded region from the diagram

1----) area of big semi circle-area of small semi circle

-----) pie r sq./2-pie r sq./2=pie/2(42 sq.-21 sq)----)22/7*2(42 sq-21 sq)

same for second one also

3-----) area of small semi circle =pie r sq. /2= pie/2(21 sq.)

same for 4th one

area of shaded region=1+2+3+4

=22/14-(42 sq.-21 sq.)+22/14(42sq. -21 sq)+pie/2(21 sq.)+ pie/2(21 sq.)

22/7(1764-441)+22/7*21*21

22(1323/7) 22(63)

22(189+63)

22(252)

=5544

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Answer 2

Answer:

Hloo mate•••

Step-by-step explanation:

Radius of big semicircles=21cm

Area of shaded region=Area of 2 semicircles

2×πr2/2

22/7×21×21

22×63

=1386sqcm•••••

please mark me as a brainliest•••