Question

if the sides of a right angled triangle are 5cm, 12cm and 13cm, then it's area is

Answer 1

ANSWER IS HERE

Area of traingle =1/2 × base× height

Base=5cm

Height =12cm

1/2×5×12

${30cm}^{2}$

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Answer 2

semi perimeter-(5+12+13)/2 =15
Heron's formula= under root [s (s-a)
(s-b)(s-c)]
=sq. root [15 (15-5)(15-12)(15-13)]
=sq. root [3×5×2×5×3×2]
= 3×5×2
= 30sq. cm



(sorry, in my keyboard there is no sign of sq. root. Therefore I wrote in [ ]s )