Geometry Vocabulary

Which is NOT a polygon?

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A polygon is a 2-D shape that has no

• vertices

• curves

• angles

• parallel lines

Which type of polygon has 3 sides, 3 angles, and 3 vertices?

• Triangle

• Square

• Octagon

• Quadrilateral

• acute angle
• obtuse angle
• right angle
• straight angle

• acute angle
• obtuse angle
• right angle
• straight angle

• perpendicular lines
• parallel lines
• vertex
• intersecting

Define Acute

• Less than 90
• Exactly 90
• Greater than 90 and less than 180
• Exactly 180

Define Obtuse

• Less than 90
• Exactly 90
• Greater than 90 and less than 180
• Exactly 180

An angle whose measure is exactly 90 degrees.

• acute
• vertical
• right
• straight

What does the prefix "quad" mean?

• three
• two
• four
• five