Răspuns :
ΔABC, mas<A=90
AC²=BC²-AB²= 25² -15²= 625-225=400 =>AC=20
A ΔABC= AC*AB/2= 20*15/2= 10*15=150cm²
AC²=BC²-AB²= 25² -15²= 625-225=400 =>AC=20
A ΔABC= AC*AB/2= 20*15/2= 10*15=150cm²
A = c₁*c₂/2 .
c₁ = 15 cm
c₂² = 25²-15²
c₂²=400
c₂=√400
c₂=20 cm .
Arie Δ = 20*15/2
Arie Δ = 150cm²
c₁ = 15 cm
c₂² = 25²-15²
c₂²=400
c₂=√400
c₂=20 cm .
Arie Δ = 20*15/2
Arie Δ = 150cm²