Question

Triangle PQR is isoscles with PQ=PR=7.5cm and QR=9cm, the height PS from P to QR is 6 cm find the area of triangle PQR what will be the height from R to PQ i.e RT?

Answer 1

area =1/2*b*h
b=9cm
h=6cm
area =1/2*9*6
=27cm sq
with PQ as base
but area remains the same
so, area=1/2*b*h
area=1/2*7.5*h
27*2=7.5*h
h=54/7.5
h=7.2