Question

find the area of triangle having perimeter 20 cm and other two sides are 8cm and 7cm​

Answer 1

Answer:

Area =216.3330765278394sq.cm

Step-by-step explanation:

Let the sides of the triangle be a,b,c

a=8cm,b=7cm

given perimeter=20cm (perimeter= sum of all sides)

a+b+c=20cm

c=5cm

area of the given triangle=$\sqrt{s*(s-a)*(s-b)*(s-c)}$

where s= perimeter