Angle Vocabulary

The two straight lines that make up an angles are called

• Vertex

• Ruler

• Segments

• Parts

The point where the two segments of an angle meet

• Middle

• Vertex

• Lines

• Dot

What do you call an angle that measures less than 90 degrees ?

• Obtuse

• Supplementary

• Right

• Acute

What do you call an angle that measures 180 degrees ?

• Straight

• Right

• Acute

• Obtuse

What tool do we use to measure angles ?

• Ruler

• Scale

• Protractor

• Tape Measure

What unit is used to measure angles ?

• Degrees

• Inches

• Celsius

• Millimeters

What do we call angles that add up to 90 degrees ?

• Supplementary

• Complementary

• Vertical

• Congruent

What is the name for an angle that measures more than 90 degrees, but less than 180 degrees ?

• Acute

• Straight

• Vertical

• Obtuse

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

• Supplementary

• Complementary

• Vertical

• Adjacent

What do we call an angle that measures exactly 90 degrees ?

• Straight

• Right

• Acute

• Obtuse