Math, asked by cahniabunda, 1 year ago

Diketahui keliling lingkaran 314 cm, besar sudut POQ=72°, dan nilai phi =3,14,luas juring OPQ adalah.. Please help me..

Answers

Answered by moose020406

1

Circumference = 2πr

314 = 2 x 3.14 xr

314 = 6.28 xr

r = 314 / 6.28

r = 50 cm

wide juring OPQ = α / 360 x πr²

= 72/360 x 3.14 x 50²

= 1 / 5 x 3.14 x 2500

= 1570

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