Question

please its urgent i have a test
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Answer 1

Heya mate!!

Here's your answer!!

Let the name of the triangle be OAB and the name of the semicircle be OCABE.

Here,

Radius of the circle = r = 10cm

∠AOB = 90° (∵ 180 - 60 - 30 = 90°)

Area of the shaded region

= Area of semicircle OCABE - Area of ΔOAB

= πr²/2 - 1/2 × r(b) × r(h)

= 3.14 × 10 × 10 × 1/2 - 1/2 × 10 × 10

=  3.14 ×  50 - 50

= 50 (3.14 - 1)

= 50 × 2.14

= 107 cm²

∴ the area of the shaded region is 107 cm².

Hope it helps you!!

Cheers :D  

#foreverJungkook