Question

Exercise 25B
1. Find the area of each of the following triangles:
(
1)
5 cm
12 cm
​

Answer 1

Step-by-step explanation:

Given, the sides of a triangle are 5cm,12cm and 13cm

semi−perimeter =

2

a+b+c

s=

2

(5+12+13)

s=

2

30

s=15cm

Area of the triangle (according to the Heron's Formula)

=

s(s−a)(s−b)(s−c)

=

15(15−5)(15−12)(15−13)

=

15(10)(3)(2)

=

900

=30cm

2

.