Question

find the area of isoceles triangle whose equal sides is 6cm 6cm and 8cm

please tell me the right answer with explanation

class 9th ​

Answer 1

Answer:

S=

2

a+b+c

=

2

6+6+8

=10

By Heron's formula

Δ=

√s(s−a)(s−b)(s−c)

=

√(10)(4)(4)(2)

=8√5cm

2

.

Answer 2

$area \: of \: triangle = \frac{1}{2} \times bh \\ = \frac{1}{2} \times 8 \times \sqrt{20} \\ = 4 \sqrt{20} \: or \: 8 \sqrt{5}$cm²