What is the measure of A

Given:

A figure of a triangle.

To find:

The measure of angle A.

Solution:

Label the points in the figure as shown below.

In the below figure,

           (Vertically opposite angles)

             (Congregant angles)

Using exterior angle theorem in triangle ABC, we get

Isolate the variable term x.

Now, the measure of angle A is:

Therefore, the correct option is B.

the probability that a bird is green (.30) is true

step-by-step explanation: