find the area of an isocles triangle whose un equal side is 8 cm each equal side is 5 cm
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Answer:
Given,
Two Equal Sides = 5cm
Also,
Third Side = 8cm
So,
Semi-Perimeter
= (a + b + c)/2
= (5 + 5 + 8)/2
= (10 + 8)/2
= 18/2
= 9
Now,
Area of ∆ = √s(s - a)(s - b)(s - c)
Area of ∆ = √9(9 - 5)(9 - 5)(9 - 8)
Area of ∆ = √9(4)(4)(1)
Area of ∆ = √144
Hence,
Area of ∆ = 12 cm²
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