Question

What is the measure of ∠b (messed up last)

Answer 1

b=30

Explanation:

The sum of all the angles of a triangle add up to 180°

∠b = 75° + 75° = 150°

Now, we need to subtract 150° from 180° to see how much does angle b measure.

∠b = 150° - 180° = 30°

30° = ∠b

The angles of the triangle would be:

75°, 75°, and 30°

To prove this, we will sum all the angles again:

75° + 75° + 30° = 180°

75° + 75° = 150°

150° + 30° = 180°

Hence, the answer is ∠b = 30°

Answer 2

b=30

Explanation:

The sum of the three angles of a triangle add to 180.

75+75+b = 180

150+b=180

Subtract 150 from each side.

b = 180-150

b=30