Question

Panjang QR=12cm
PR=13 cm
RS =5cm
PS=12 cm
PQR=...........

Answer 1

PS² = PR² - RS²
PS² = 13² - 5²
PS² = 169 - 25
PS = √144
PS = 12 cm

L ΔPQR
= L ΔPQS - L Δ PRS
= 1/2×QS×PS - 1/2×RS×PS
= 1/2×17×12 - 1/2×5×12
= 102 - 30
= 72 cm²