Identifying Lines and Angles

4.G.1

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

Section 1's definition matching and sketches, plus naming the perpendicular segments in trapezoid ABCD.

4.G.2

“Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles.”

The Section 2 classifications: the trapezoid's parallel and right-angle questions and the identify-the-right-triangle item for PQR.

4.G.3

“Recognize a line of symmetry for a two-dimensional figure as a line across the figure such that the figure can be folded along the line into matching parts. Identify line-symmetric figures and draw lines of symmetry.”

All of Section 3, from the star's dashed line to the zero-line scalene triangle.