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Verified answer
Luas segitigaalas x tinggi : 2
17 x 18 = 306 : 2 = 153 cm
maaf kalau salah
a + c = 25 <=> c = 25 - a
c + b = 17
25 - a + 18 - a = 17
43 - 2a = 17
2a = 43 - 17
2a = 26
a = 26/2
a = 13 cm
b = 18 - a
b = 18 - 13
b = 5 cm
c = 25 - a
c = 25 - 13
c = 12 cm
a^2 = b^2 + c^2
13^2 = 5^2 + 12^2
169 = 25 + 144
169 = 169 (segitiga siku-siku)
L = 1/2 × b × c
L = 1/2 × 5 × 12
L = 30 cm^2
Jadi luas segitiga ABC adalah 30 cm^2