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The development of lateral surface of a pyramid consists of a number of equal ____________triangle in contact.

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The development of lateral surface of a pyramid consists of a number of equal ____________triangle in contact.

(a) equilateral

(b) isosceles

(c) scalene

(d) right angled

I had been asked this question in final exam.

This intriguing question comes from Development of Surfaces in portion Development & Intersection of Surfaces of Engineering Drawing

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The correct option is (b) isosceles

Explanation: The development of lateral surface of a pyramid consists of a number of equal isosceles triangles in contact. The base and sides of each triangle are respectively equal to the edge of the base and slant edge of the pyramid.

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