January 25th Flashcardziz Vertical Angles and Linear Pair Angles

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are always congruent.

Front

What are linear pair angles?

Back

A pair of adjacent angles that form a straight line; they are supplementary.

Front

If angle A is 30 degrees, what is its complementary angle?

Back

60 degrees, because 30 + 60 = 90.

Front

If angle B is 120 degrees, what is its supplementary angle?

Back

60 degrees, because 120 + 60 = 180.

Front

Identify the angle pair: angle 1 and angle 2 are adjacent and form a straight line. What type of angle pair are they?

Back

Linear pair.

Front

If angle 3 is 45 degrees, what are the measures of the vertical angles?

Back

Both vertical angles are also 45 degrees.

Front

What is the relationship between linear pair angles?

Back

They are always supplementary.

Front

If angle 4 is 70 degrees, what is the measure of its complementary angle?

Back

20 degrees, because 70 + 20 = 90.