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1/2x A x T = 180
1/2x 8n x 5n= 180
20n² = 180
n² = 9
n = 3
Tinggi 5 x n = 5 x 3 = 15cm
a: 8
t: 5
asli:
L: 180
perbandingan:
L=axt/2
=8.5/2
=20
L=180/20
L=9
t=5x9
t=45
jadi tinggi segitiga 45