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

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