Find the area of an isosceles triangle whose base is 8cm and perimeter 20cm.
Answers
Answered by
0
Answer:
Answer
S=
2
a+b+c
=
2
8+8+9
=12.5
By Heron's formula
Δ=
s(s−a)(s−b)(s−c)
=
(12.5)(3.5)(4.5)(4.5)
=29.765cm
2
.
Answered by
2
Answer:
A≈17.89cm²
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