Question

13An isosceles triangle has perimeter 30 cm and each of the
equal sides is 12 cm find the area of the triangle​

Answer 1

Answer:

72

Step-by-step explanation:

perimeter of traingle = 30 cm

two side = 12,12

so, area of traingle = 1/2*b*h

=1/2*12*12

=6*12

=72 cm

therefore,area of traingle = 72 cm

Answer 2

12=12 [As they are equal sides]

12+12+x=30

24+x=30

x=30-24

x=6

Semi perimeter=30/2

=15

Area of traingle by Herons formula

√30(30-24)(30-24)(30-6)

√30×6×6×24

√6×5×6×6×6×4

6×6√5×4

36√20 is the area of traingle.