Question

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

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

Step-by-step explanation:

Perimeter = 30 cm

Ist and IInd sides = 12cm

IIIrd side = 12 + 12 + c = 30cm

24 + c = 30

.:c = 30 - 24

c = 6 cm

a = 12 cm

b = 12 cm

c = 6 cm

s = a+b+c /2

s = 30 / 2 = 15 cm

Area of the ∆ = √s(s-a)(s-b)(s-c)

√15(15-12)(15-12)(15-6)

√15(3)(3)(9)

√3×5×3×3×3×3

( By taking pairs of same numbers ) we get

3×3√3×5

9√15 cm^2. Answer