Question

Fig. 12.10
Find the area of a triangle two sides of which are 18cm and 10cm and the perimeter is
42cm.
4.​

Answer 1

Step-by-step explanation:

Given: a=18cm b=10cm c=? P=42cm

p=a+b+c

then 42-10-18=c

c=14

Area of triangle =P=a+b+c

A =P﹣b﹣c

42﹣10﹣14=18