If the perimeter of (bigtriangleup)PQR in thr diagram is 24cm, what is the area of (bigtriangleup)PRS?
-
A.
19.5cm2 -
B.
15.0cm2 -
C.
13.0cm2 -
D.
9.3cm2
Correct Answer: Option B
Explanation
Perimeter of (bigtriangleup) PQR = PQ + QR + PR
24cm = 6cm + 8cm = PR
24 = 14 + PR
PR = 24 – 14 = 10cm
Area of (bigtriangleup) PRS = (frac{1}{2} times 10 times 3cm^3)
= 15cm3