Question

name the vertex of anglea) name the vertex of the angleb)name the sides of the angle e)give three ways to name the anglec) classify the angle

Answer 1

(a) We can name the vertex as B.

(b) We can name the sides as A and C.

The image below shows the angles with their names.

(c) The angle on the left is an obtuse angle because it measures more than 90°. The angle on the right is a right angle because it's equal to 90°.

(e) At last, we name these angles in three ways, using a greek later, using the three letters on the points, or just given the letter of the vertex.

$\begin{gathered} m\angle\alpha \\ m\angle\text{ABC} \\ m\angle B \end{gathered}$