We will discuss here about the Base and height (altitude) in a triangle and a parallelogram.

In ∆PQR, any side may be taken as the base. If QR is taken as the base then the perpendicular PM on QR is the corresponding altitude (height) of the triangle.

In the parallelogram PQRS, any side may be taken as the base. If SR is taken as the base then the perpendicular MN on SR is the corresponding height (or altitude) of the parallelogram, M being a point on the side PQ where PQ ∥ SR.

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