Question

An isosceles tringle has perimeter 30cm and its non equal side is 12 cm. its equal sides are of measurement​

Answer 1

Step-by-step explanation:

Perimeter of isosceles triangle=30cm

Length of equal sides=12cm

Let third side of triangle=xcm

According to problem,

x+12+12=30

x+24=30

x=30−24

x=6

∴ Third side of triangle=6cm

Using Heron's formula

Area of triangle=

s(s−a)(s−b)(s−c)

q. units

where s=

2

a+b+c

s=

2

30 =15

Area of triangle= 15(15−12)(15−12)(15−6)

cm 2 = 15×3×3×9

cm 2

=3×3× =15

cm 2

=9

15 cm 2

∴ Area of triangle=9

15 cm

2

.

Answer 2

Answer:

measurement of equal sides is 9cm

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