Question

Sides of a triangle are 9cm, 12cm

and 15cm.Find the area and the

inradius​

Answer 1

Step-by-step explanation:

Since the sides of the traingle are 9, 12 and 15 which is a right angle triangle.

15²=9²+12²,

Therefore

Area of triangle = 1/2 × 9 × 12,

= 54 cm²

Answer 2

Step-by-step explanation:

the sides of triangle represent a right angle triangle

area =1/2 × base x height

=1/2×9×12 =54 cm²

inradius = area of triangle /s,semiperimeter of triangle

s=a+b+c/2 = 9+12+15/2= 36/2=18 cm

inradius =54/18=3 cm