Hitunglah luas ∆klm jika diketahui k = 16 cm, l = 14 cm dan m = 10 cm adalah....

k = 16 cm
l = 14 cm
m = 10 cm

S = 1/2 × K segitiga klm
= 1/2 × ( 16 + 14 + 10)
= 1/2 × 40
= 20 cm
L = akar [S × (S - k)(S - l)(S - m)]
= akar [20 × (20 - 16)(20 - 14)(20 - 10)]
= akar [20 × 4 × 6 × 10]
= akar 4800
= 69,28 cm^2

Diketahui = K = 16 cm
L = 14 cm
M = 10 cm

S = 1/2 × K segitiga KLM
= 1/2 × ( 16+14+10 )
= 1/2 × 40
= 20
L = akar [ s× ( s - k )( s- l )( s- m ) ]
= akar [ 20 × ( 20-16 )( 20-14)( 20- 10 ) ]
= akar ( 20 × 4 × 6 × 10 )
= akar 4.800
= 69,28 cm^2