Two equal sides of an isosceles triangle are 13 cm each and its
perimeter is 36 cm, then the area of the triangle is
_____________.
a) 20 cm2 b) 30 cm2 c) 40 cm2 d) 60 cm2
Answers
Answered by
6
Answer:
60cm2
Step-by-step explanation:
We have
perimeter of triangle=36cm
and ,its two equal side=13cm
Let third side be xcm
Then
perimeter=36cm
13+13+x=36
∴x=10cm
Now
S=
2
perimeter
=
2
36
=18
Now
Area of triangle=
s(s−a)(s−b)(s−c)
=
18(18−13)(18−13)(18−10)
=
18(5)(5)(8)
=
2×3×3×5×5×2×2×2
=2×3×5×2
=60cm
2
.
Hence,
Area of trinagle=60cm
2
.
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