Jharne De and Ranjana Kumar Solutions for Chapter: Basic Geometrical Concepts, Exercise 1: Exercise

How many angles are formed in the following figure? Write the adjacent angles also.

Take three collinear points and join them. What figure do you get? If the points are non-collinear, then after joining these points, what figure do you get?

In the given figure, find the number of triangles and name them.

In the given figure, find the triangles with vertex $\mathrm{E}.$

In the given figure, find the side opposite to vertex $\mathrm{D}.$

Identify the altitudes if $∆\mathrm{A}\mathrm{B}\mathrm{C}.$

Draw a rough sketch of $∆ABC.$ Name its vertices, sides, and angles. Draw all medians of $∆\mathrm{A}\mathrm{B}\mathrm{C}$.

Two angles of triangle are in the ratio $1:2$ and its third angle is $60°$. Find the other two angles of the triangle.