What is the measure of the angle?

115°

Step-by-step explanation:

The external angle of a triangle is equal to the sum of the 2 opposite interior angles.

? is an exterior angle of the triangle , thus

? = 75° + 40° = 115°

Step-by-step explanation:

let's get the missing side as x

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value

3

step-by-step explanation:

because where the point where the 2 lines intersect is (3,-1) the x value is 3