Question

find the area of the triangle whose 2 sides of which are 7cm 10 cm and perimeter is 30​

Answer 1

Answer: The area of the triangle whose 2 sides of which are 7cm 10 cm and perimeter is 30 is ​20√3cm^2

Step-by-step explanation:

Let x be length of third side

Here we have 3 sides 7,10,x

Perimeter =30 cm

7+10+x=30

17+x=30

x=30-17

x=13 cm

2s=30

s=15 cm

a=7,b=10,c=13

We have to find the area of the triangle  using the formula,

$A=\sqrt{s} (s-a)(s-b)(s-c)$$A=\sqrt{}15 (15-7)(15-10)(15-13)$

=$A=\sqrt{15} (8*5*2)$

=$A=\sqrt{15} * (80)$

A=√1200

=20√3cm^2 or 34.64 is the answer

The area of the triangle whose 2 sides of which are 7cm 10 cm and perimeter is 30 is ​20√3cm^2