Question

An isosceles triangle with sides 2.5 cm ,2.5 cm,3 cm find its area

Answer 1

Answer:

the perimeter of the triangle is (2.5+2.5+3)cm

=8 cm

half of the perimeter =8/2cm=4cm

the area of the isosceles triangle

=√4.(4-2.5)(4-2.5)(4-3) sq cm

=2×1.5 sq cm

=3sq cm

Answer 2

Answer:

semiperimeter= (2.5+2.5+3)/2

8/2=4cm

Area of triangle=√s(s-a)(s-b)(s-c)

√4(1.5)(1.5)(1)

=1.5*2=3cm²

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