1.

Find thr area of an isosceles triangle whose petimeter is 30cm and each of equal sides is 12cm​

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Answer:

Step-by-step EXPLANATION:

we KNOW that area of a triangle is sum of all sides

i.e a+b+c= 30 (given)

we have given to sides i.e  12 cm and 12 cm

so 12 +12+c=30

24+c=30

c=30-24

c=6 cm

semi perimeter of a triangle = a+b+c/2

= 12+12+6/2

=30/2

= 15

area of a triangle = under root s (s+a)(s+b)(s+c)

now PUT the VALUE of a and b and c and u will GET the area of the triangle


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