Question

What is the area of 30 cm 30 cm 26 cm of a triangle

Answer 1

13√731 cm²

Explanation:

Heron

A = √p(p-a)(p-b)(p-c)

p = (a+b+c)/2 = (30+30+26)/2 = 86/2 = 43

A = √43*(43-30)(43-30)(43-26)

= √43*13*13*17

= 13√43*17

= 13√731 cm²

Phytaghora

h = √30² - 13²

= √900 - 169

= √731

A = h × b/2

= √731 × 26/2

= 13√731 cm²