Tolong di kasih tau caranya dan jawabannya!

T = √15²-9²
=√225-81
=√144
=12
A = 16+9
=25
Jawab :
L ∆ = 1/2 × A × T
=1/2×25×12
=25×12/2
=300/2
=150 cm²

Semoga membantu...