Question

Jawab no 8 yah
tolong dong!!!

Answer 1

L=10×7 + 1/2 (1/4 πd²)
 = 70 + 1/8 πd²
 = 70 + 1/8.22/7.7²
 = 70 + 1/8 . 22 . 7
 = 70 + 154/8
 = 70 + 19¹/₄
 = 89¹/₄ m²

(Jawaban : D)

Answer 2

L = L persegi panjang + L setengah lingkaran
L persegi panjang = p x l
= 10 m x 7 m
= 70 m²

L setengah lingkaran =
1/2 x π x r x r
= 1/2 x 22/7 x 3,5 x 3,5
= 1/2 x 22 x 0.5 x 3,5
= 1/2 x 38.5
= 19,25 m²
= 19 1/4 m²

L = L persegi panjang + L setengah lingkaran
= 70 m² + 19 1/4 m²
= d. 89 1/4 m²