Question

Find the measure of angle b

Answer 1

65°

Explanation:

angles are on a straight line = sum of 180°, to find the value of "b" subtract the known angle (115°) from 180°

180 - 115 = 65°

Answer 2

b = 65 degrees

Explanation:

As we can see, the line that angle b and 115 deg correspond to is a straight line. A straight line always measures at 180 deg.

Because of this principle, we know that:

`115+ b = 180`

We can simplify this one variable equation now:

`b=180-115\\`

Now solve:

`b=65`

And this makes sense. Just by eyeballing the angle, we can see that it is under 90 degrees.

So, b = 65 degrees