CBSE Notes, Lectures

CBSE - Mathematics - Introduction to Euclids Geometry

Introduction to Euclids Geometry

NCERT Exercise Exercise 5.1

If a point C lies between two points A and B such that AC = BC, then prove that AC = 1/2 AB. Explain by drawing the figure.

Here, AC = BC
Now, adding AC both sides.
AC + AC = BC + AC
also, BC +AC  = AB (as it coincides with line segment AB)
∴ 2 AC = AB (If equals are added to equals, the wholes are equal.)
⇒ AC = 1/2 AB.

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