Question

two side of triangle are 5 cm and 13 cm and if perimeter is 30 cm the area of the triangle in cm is

Answer 1

Answer:

Step-by-step explanation:

According to herons formula  - area of a triangle = sqrt(s(s-a)(s-b)(s-c))

where S = perimeter/2

so perimeter = 30

S  = 30/2 = 15

a = 5

b = 13

c = 30-(5+13) = 12

Using the formula

Area =

  sqrt(15(15-5)(15-13)(15-12))

= sqrt(15(10)(2)(3))

= sqrt(5*3*5*2*2*3) [Splitting each number to its prime factors]

= sqrt(5*3*2*5*3*2)

= sqrt(30*30)

= 30

So are of the triangle = 30cm^2

Answer 2

Answer:

correct ans: 30cm²

Step-by-step explanation:

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