Question

What is the area of a triangle with sides 13 14 15?

Answer 1

perimeter of triangle = 13+14+15=42
half of perumeter =21
by heron formula
plz see in photo

Answer 2

84

Step-by-step explanation:

s=a+b+c/2

= 13+14+15/2

= 42/2

= 21

by heron's formula

= ✓s(s-a)(s-b)(s-c)

= ✓21×(21-13)(21-14)(21-15

= ✓21×8×7×6

= ✓7×3×4×2×7×3×2

= 7×3×2 ✓4

= 21×2✓2×2

= 21×2×2

= 42×2

= 42

Ans = 84