Pairs of Angles - GEOMETRY 1.4

The video tutorial covers various types of angle pairs in geometry, including adjacent, linear pairs, complementary, supplementary, and vertical angles. It explains the properties of each type, how to identify them, and how to calculate missing angles. The tutorial also provides mnemonic devices to help remember the differences between complementary and supplementary angles. The session concludes with problem-solving examples to reinforce the concepts learned.

What is the defining characteristic of adjacent angles?

• They add up to 180 degrees.

• They share a common line.

• They are equal in measure.

• They are opposite each other.

What do linear pairs of angles add up to?

• 90 degrees

• 180 degrees

• 360 degrees

• 45 degrees

Which of the following is true about complementary angles?

• They add up to 90 degrees.

• They are always equal.

• They form a straight line.

• They add up to 180 degrees.

How can you find the supplement of an angle?

• Subtract the angle from 90 degrees.

• Add the angle to 180 degrees.

• Subtract the angle from 180 degrees.

• Add the angle to 90 degrees.

If two angles are supplementary, what is their sum?

• 270 degrees

• 360 degrees

• 180 degrees

• 90 degrees

What is a key property of vertical angles?

• They are always supplementary.

• They are always complementary.

• They always form a linear pair.

• They are always equal.

What happens when two lines intersect?

• They form two angles.

• They form five angles.

• They form four angles.

• They form three angles.