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In the polygon ABCDEF with 6 sides, angle A is 170 degrees, angle C is 133 degrees, angle D is 102 degrees, angle E is 117 degrees, and angle F is 90 degrees. What is the measure of angle B?

a. 98°
b. 108°
c. 118°
d. 128°

Answer :

Final answer:

Angle B measures 108 degrees.

Therefore, the correct option is B.

Explanation:

To calculate the measure of angle B in the six-sided polygon ABCDEF, we use the fact that the sum of the interior angles of any n-sided polygon is given by the formula (n-2)×180 degrees.

Since we are provided with a six-sided polygon (hexagon), the sum of the interior angles will be (6-2)×180 = 4×180 = 720 degrees.

We are given the measures of five of the six interior angles:

Angle A = 170 degrees

Angle C = 133 degrees

Angle D = 102 degrees

Angle E = 117 degrees

Angle F = 90 degrees

To find the measure of angle B we subtract the sum of the given angles from the total sum of the interior angles.

Therefore, the measure of angle B is:

720 degrees - (170 + 133 + 102 + 117 + 90) degrees = 108 degrees.

So, the measure of angle B is 108 degrees.

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