Q19 of 69 Page 240

For an isosceles triangle having base b and each of the equal sides as a, we have:
I. Area =

II. Perimeter = (2a +b)

III. Height =

Which of the following is true?

According to question, we have:

Base of triangle = b

Equal sides of triangle = a

∴ Area =

Perimeter = (2a + b)

And, Height =

∴ I, II and III are true

Hence, option (d) is correct

The difference between the semi- perimeter and the sides of a ∆ ABC are 8cm, 7cm and 5cm respectively. The area of the triangle is –

For an isosceles right angles triangle having each of equal sides ‘a’ , we have

I. Area =a²

II. Perimeter = (2 +)a

III. Hypotenuse = 2a

Which of the following is true?

The question consists of two statements namely, Assertion (a) and Reason (R). Please select the correct answer.

Assertion (A)	Reason (R)
Area of an equilateral triangle having each side equal to 4cm is sq cm.	Area of an equilateral triangle having each side a is a² sq units.

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 .

For an isosceles triangle having base b and each of the equal sides as a, we have:I. Area = II. Perimeter = (2a +b)III. Height = Which of the following is true?