Question

Find the area of the triangle whose sides are of measure 13cm and 14cm and perimeter is 42​

Answer 1

Answer:

84 cm²

Step-by-step explanation:

Let the unknown no. be x.

13+ 14 + x = 42

So x = 42 - 27

x= 15 cm

s = a + b + c (Apply Herons Formula)

2

s = 13 + 14 + 15

2

s = 42

2

s = 21

Now, Area of triangle = √s(s-a)(s-b)(s-c)

=√21 (21-13) (21-14) (21-15)

=√21×8×7×6

So,Area of triangle = 84cm².