Question

Hitung luas lingkaran,jika diketahui jari-jarinya sebagai berikut:
A)r=14cm C)r=21cm E)r=45cm G)r=56cm
B)r=20cm D)r=35cm F)r=49cm

Answer 1

A) L = Πr² = 22/7 × 14 × 14 = 616 cm²
b) L = Πr² = 3,14 × 20 × 20 = 1256 cm²
c) L = Πr² = 22/7 × 21 ×21 = 1386 cm²
d) L = Πr² = 22/7 × 35 × 35 = 3850 cm²
e) L = Πr² = 3,14 × 45 × 45 = 6358,5 cm²
f) L = Πr² = 22/7 × 49 × 49 = 7546 cm²
g) L = Πr² = 22/7 × 56 × 56 = 96096 cm²

Semoga membantu.

Answer 2

A. 22/7 x 14 x 14 = 616 b. 3.14 x 20 x 20 = 1.256 c. 22/7 x 21 x 21 = 1.386 d. 22/7 x 35 x 35 = 3.850 e. 3,14 x 45 x 45 = 6.358,5 f. 22/7 x 49 x 49 = 7.546 g.