Question

the perimeter of a triangle with side 5cm ,12cm , and 13cm is​

Answer 1

Step-by-step explanation:

Given,

Sides of a triangle are= 5cm, 12cm, 13cm

Therefore,

Perimeter of the triangle is = (5+12+13) cm

                                            = 30 cm (Ans)

Answer 2

Answer:

using using heron's formula

A = √s ( s - a) (s - b) (s - c)

where,

a = 5cm

b = 12 cm

c = 13 cm

s = a + b + c ÷ 2

s = 5 + 12 + 13 ÷ 2

s = 15 cm

A =√15 (15 - 5) (15 - 12) (15 - 13)

A =√15 × 10 × 3 × 2

A = 30 cm²

A = 0.003 cm²