Angles, Lines, Triangles and Symmetry

Which of the following angles describe an obtuse triangle?

• acute, acute, acute

• right, acute, acute

• acute, acute, obtuse

• obtuse, right, acute

How are the lines above best described?

• Intersecting

• Perpendicular

• Parallel

An acute triangle has how many acute angles?

• 0

• 1

• 2

• 3

Which of the following triangles are acute triangles?

• B and D

• F and C

• A and E

• A and B

Which term best describe figure AB

• Line

• Ray

• Angle

• Quadrilateral

Which term best describes EB

• Ray

• Line Segment

• Angle

• Quadrilateral

What term best describes EBG?

• Ray

• Acute Angle

• Obtuse Angle

• Right Angle

Which term best describes CGB?

• Ray

• Acute Angle

• Obtuse Angle

• Right Angle

A right triangle has how many acute angles?

• 0

• 1

• 2

• 3

Which term best describes GA?

• Line Segment

• Quadrilateral

• Ray

• Angle