Solving for Mystery Angles in Geometry

The video tutorial explains how to find the measure of angle COB using given information about adjacent angles. It starts by identifying the angles and the given data, including the measure of an adjacent angle (45 degrees) and the combined angle (70 degrees). The tutorial then demonstrates the calculation process, showing that angle COB is 25 degrees by subtracting the measure of the adjacent angle from the combined angle.

What is the point labeled as the center in the angle COB?

• Point O

• Point C

• Point B

• Point D

What is the measure of angle DOC?

• 45 degrees

• 25 degrees

• 70 degrees

• 90 degrees

Which angle is adjacent to angle COB?

• Angle BOD

• Angle DOC

• Angle BOC

• Angle COD

What is the combined measure of angles COB and DOC?

• 115 degrees

• 25 degrees

• 70 degrees

• 45 degrees

How is the measure of angle COB calculated?

• 70 minus 45

• 45 minus 25

• 70 plus 45

• 45 plus 25

Which of the following is true about the relationship between angle COB and angle DOC?

• They are complementary

• They are supplementary

• They are equal

• They are neither complementary nor supplementary

What is the final calculated measure of angle COB?

• 25 degrees

• 45 degrees

• 70 degrees

• 20 degrees