Understanding Special Angle Relationships

Miss Li introduces special angle relationships, focusing on adjacent, complementary, and supplementary angles. She explains their properties and how to use them to find missing angle measures. The video includes examples and memory aids to help students understand and remember these concepts.

What is a key characteristic of adjacent angles?

• They add up to 90 degrees.

• They form a straight line.

• They share a common vertex and ray.

• They are always congruent.

Which of the following is true about complementary angles?

• They add up to 90 degrees.

• They form a straight line.

• They add up to 180 degrees.

• They are always equal.

If one angle measures 30 degrees, what is the measure of its complementary angle?

• 60 degrees

• 90 degrees

• 150 degrees

• 30 degrees

What is the sum of the measures of supplementary angles?

• 180 degrees

• 90 degrees

• 45 degrees

• 360 degrees

How can you remember the difference between complementary and supplementary angles?

• Supplementary angles are always equal.

• Complementary angles form a straight line.

• Supplementary angles add up to 90 degrees.

• Complementary angles start with 'C' and can be turned into a '9' for 90 degrees.

If two angles are supplementary and one measures 118 degrees, what is the measure of the other angle?

• 82 degrees

• 62 degrees

• 92 degrees

• 72 degrees

What do complementary angles form when they are adjacent?

• An obtuse angle

• A right angle

• A straight line

• An acute angle

If two angles are adjacent and form a straight line, what is their relationship?

• They are equal.

• They are congruent.

• They are supplementary.

• They are complementary.

In a triangle, if one angle is 67 degrees and is adjacent to another angle on a straight line, what is the measure of the adjacent angle?

• 113 degrees

• 67 degrees

• 180 degrees

• 90 degrees

What is the measure of an angle that is complementary to a 58-degree angle?

• 52 degrees

• 32 degrees

• 42 degrees

• 62 degrees