Question

Jawab pakai cara ya..

Answer 1

1. Luas 1 = p x l
= 20 x 18 = 360 cm2
Luas 2 = 1/2 x a x t
= 1/2 x 5 x 20 = 50 cm2
Luas 3 = 1/2 x p x r x r
= 1/2 x 3,14 x 10 x 10 = 157 cm2
Luas segi banyak = 360 + 50 + 157 = 567 cm2
2. Luas 1 = diagonal 1 x diagonal 2
= 28 x 7 = 196 cm2
Luas 2 = 1/2 x p x r x r
= 1/2 x 22/7 x 14 x 14 = 308 cm2
Luas segi banyak = 308 - 196 = 112 cm2
3. Luas 1 = diagonal 1 x diagonal 2
= 21 x 8 = 168 cm2
Luas 2 = 1/2 x p x r x r
= 1/2 x 3,14 x 6 x 6 = 56,52 cm2
Luas segi banyak = 168 + 56,52 = 224,52 cm2