RS Aggarwal & V Aggarwal - Mathematics

Book: RS Aggarwal & V Aggarwal - Mathematics

Chapter: 7. Areas

Subject: Mathematics - Class 9th

Q. No. 21 of CCE Questions

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21

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 = 8cm and each of the equal sides = 5cm is 12cm2.



The area of an isosceles triangle having each of the equal sides as a and base =b is .


In the given question, we have

Area of isosceles triangle =


Here, we have:


a = 5 cm and b = 8 cm



= 2 ×


= 2 ×


= 2 × 6


= 12 cm2


Also, Area of an isosceles triangle having each of the equal sides as a and base b =


Both Assertion and Reason are true


Hence, option (a) is correct

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