Find the area of a triangle whose sides are 13 cm, 14 cm and 15 cm.
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Answer:
84 m²
Step-by-step explanation:
given in a triangle sides are ,
a = 13cm, b = 14cm , c = 15cm
s = a + b + c / 2
= 13 + 14 + 15 / 2
= 42 / 2
= 21 cm
area = ✓s (s - a ) ( s- b ) ( s - c )
= ✓ 21 (21 - 13 ) ( 21 - 14 ) ( 21 - 15 )
= ✓21(8)(7)(6)
= ✓3×7×2³×7×2×3
= ✓3² × 7² × 2⁴
= 3 × 7 × 2²
= 21 × 4
= 84 m²
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