Question

Luas segitiga dimana a=14cm, b=12cm, c=6cm adalah.... cm.
A. 18,93
B. 19,93
C. 20,93
D. 29,93

Answer 1

S= 1/2(14+12+6)
S= 1/2(32)
S= 16cm
L∆ = √S(s-a) (s-b) (s-c)
L∆= √(16 (16-14) (16-12) (16-6))
L∆= √(16 (2) (4) (10)
L∆ = √ 1280
L∆= 35,77