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L = 1/2 x alas x tinggi = 1/2 x 16 x 13 = 8 x 13 = 104 cm kuadrat
Luas segitiga dengan alas 20 cm dan tinggi 17 cm
L = 1/2 x alas x tinggi = 1/2 x 20 x 17 = 10 x 17 = 170 cm kuadrat
L segitiga dgn alas 16 cm dan tinggi 13 cm
1 x16x13=208=104
2 2
L segitiga dgn alas 20 cm dan tinggi 17 cm
1 x20x17=340=170
2 2