Question

The Triangle Angle Sum Theorem states that the sum of the angles inside a triangle must equal 180°.
Using this theorem, find the measure of angle B.
A
B
100°
55°
C
(1 point)
• 25°
0 335°
• 80°
45

Answer 1

To find the measure of angle B, we can use the Triangle Angle Sum Theorem which states that the sum of the angles inside a triangle must equal 180°.

Let's label the angles in the triangle:
Angle A = 100°
Angle B = x (unknown)
Angle C = 55°

Now, we can use the theorem to set up the equation:
A + B + C = 180
100 + x + 55 = 180
155 + x = 180
x = 180 - 155
x = 25

Therefore, the measure of angle B is 25°.