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600= 30 x d2 / 2
600 = 15 x d2
d2 = 40
sisi² = (1/2.d1)²+(1/2.d2)²
= (1/2.30)²+(1/2.40)²
= 15² + 20²
= 225 + 400
= 625
sisi = √625
= 25
K= 4 x sisi
= 4 x 25 = 100cm
jawaban B
8. K = 4 x sisi
sisi = K/4
= 272/4
= 68
(1/2.d2)² = sisi² - (1/2.d1)²
= 68² - (1/2.120)²
= 4624 - 60²
= 4624 - 3600
= 1024
1/2. d2 = √1024
= 32
d2 = 32 x 2
= 64
L = d1 x d2 / 2
= 120 x 64 / 2
=3840 cm²
jawaban D