RS Aggarwal & V Aggarwal - Mathematics

Book: RS Aggarwal & V Aggarwal - Mathematics

Chapter: 7. Areas

Subject: Mathematics - Class 9th

Q. No. 14 of CCE Questions

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14

Each of the equal sides of an isosceles triangle is 13cm and base is 24cm. The area of the triangle is –

It is given in the question that,

Equal sides of isosceles triangle = 13cm


Base = 24 cm and = 12 cm


Let the height of the triangle be h


(13)2 = (12)2 + h2


169 = 144 + h2


h2 = 169 – 144


h2 = 25


h = 5


Thus, area of triangle =


=


=


= 2


Hence, option (c) is correct

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