The question consists of two statements namely, Assertion (a) and Reason (R). Please select the correct answer. Assertion (A) Reason (R) The area of an isosceles triangle having base = 24 cm and each of the equal sides equal to 13cm is 60cm 2 . If 2s = (a + b+ c) where a, b, c are the sides of a triangle, then area = .

Question

Philoid · Accepted Answer

From the given question, we have

a = 24 cm, b = 13 cm and c = 13 cm

∴ s =

=

= 25 cm

Now, by using heron’s formula we have:

Area of triangle =

=

= 5 × 12

= 60 cm²

Also, if 2s = (a + b + c) where a, b and c are the sides of the triangle then:

Area =

∴ Assertion and reason both are correct

Hence, option (a) is correct

Assertion (A)	Reason (R)
The area of an isosceles triangle having base = 24 cm and each of the equal sides equal to 13cm is 60cm².	If 2s = (a + b+ c) where a, b, c are the sides of a triangle, then area = .