Adjacent Angles

Front

What are adjacent angles?

Back

Adjacent angles are two angles that share a common vertex and a common side, but do not overlap.

Tags

CCSS.7.G.B.5

Front

If two angles are adjacent and one measures 80 degrees, what is the measure of the other angle if they form a straight line?

Back

The other angle measures 100 degrees because adjacent angles on a straight line sum up to 180 degrees.

Tags

CCSS.7.G.B.5

Front

What is the sum of two adjacent angles?

Back

The sum of two adjacent angles can vary, but if they form a straight line, their sum is 180 degrees.

Tags

CCSS.7.G.B.5

Front

If ∠CAD measures 30 degrees, what is the measure of its adjacent angle ∠DAB if they form a straight line?

Back

∠DAB measures 150 degrees because 180 - 30 = 150.

Tags

CCSS.7.G.B.5

Front

What is the measure of ∠BAD if it is adjacent to ∠CAD which measures 30 degrees and they form a right angle?

Back

∠BAD measures 60 degrees because 90 - 30 = 60.

Tags

CCSS.7.G.B.5

Front

If two adjacent angles are complementary, what is the sum of their measures?

Back

The sum of their measures is 90 degrees.

Tags

CCSS.7.G.B.5

Front

Find the missing angle if ∠A measures 85 degrees and ∠B is adjacent to it on a straight line.

Back

∠B measures 95 degrees because 180 - 85 = 95.

Tags

CCSS.7.G.B.5

Front

What is the measure of ∠CAD if it is adjacent to ∠DAB which measures 90 degrees?

Back

∠CAD can be any angle that, when added to 90 degrees, equals 180 degrees, so it measures 90 degrees.

Tags

CCSS.7.G.B.5

Front

If ∠BAD measures 123 degrees, what is the measure of its adjacent angle ∠CAD if they form a straight line?

Back

∠CAD measures 57 degrees because 180 - 123 = 57.

Tags

CCSS.7.G.B.5

Front

What do you call angles that add up to 180 degrees?

Back

They are called supplementary angles.

Tags

CCSS.7.G.B.5