Question

Find the area of the triangle with sides 21 cm, 16 cm and 13 cm. Also, find the perimeter of an equilateral
triangle equal in area to this triangle.​

Answer 1

Explanation:

$\huge{\underline{\underline{\mathtt{\purple(A)\green{N}\pink{S}\blue{W}\purple{E}\red{R}}}}}$

Given sides of triangle

a=13,b=14,c=15

Semi-perimeter s=

2

1

(a+b+c)=

2

1

(13+14+15)=21

Area, A =

s(s−a)(s−b)(s−c)

A=

21(21−13)(21−14)(21−15)

A=84 cm

2

Answer 2

$\huge \rm \red{\underline{\underline{Answer :- }}}$

• 13 + 21 + 16 is the answer