4.GR.C.8: Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

Example Problems

\angle QRS

measures

90\degree

.
What type of angle is it: acute, obtuse, right, or straight?

\angle JKL

measures

180\degree

.
What type of angle is it: acute, obtuse, right, or straight?

\angle PQR

is a right angle.
Which of the following could be its measure?

A.

2^\circ

B.

60^\circ

C.

90^\circ

D.

180^\circ

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