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Find the area of a triangle two sides of which are 8 cm and 11 cm and perimeter is 32
Section C
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Step-by-step explanation:
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Answer:
8 root 30 cm²
Step-by-step explanation:
two sides = 8cm , 11 cm
third side = 32 - (8 + 11)
= 13cm
by heron's formula :
semi-perimeter =p÷2
=16cm
area = square root of (16(16-13)(16-11)(16-8))
= square root of (16 × 3 × 5 × 8 )
= root of (2×2×2×2×3×5×2×2×2)
= 8 × root of (30)
= 8 root 30 cm²
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