Question

1. What is the measure of ∠ABC? What is the measure of ∠ABD?

Answer 1

Answer:

$\angle ABC=145\°$ and $\angle ABD=35\°$

Step-by-step explanation:

According to the given diagram, points C, B and D are in a straight line and AB is a common terminal side of both $\angle ABC$ and $\angle ABD$.

So, $\angle ABC$ and $\angle ABD$ are pair of linear angles.

In the diagram, we can see that the side $AB$ lies on $145$ from left side and on $35$ from right side.

So, $\angle ABC=145\°$

and $\angle ABD=35\°$

Answer 2

Answer:

ABC = 145 degrees

ABD =  35 degrees

Step-by-step explanation:

A straight line is 180 degrees, for ABC you start from 0 and count up along the outside number of the half circle. So, therefor, ABC =145.

To solve ABD you subtract 145 from 180 and you get 35 degrees.