About this worksheet
A labeling sheet for 4th grade on the core figures of Common Core 4.G.1. An eight-term word bank (line, line segment, ray, right angle, acute angle, obtuse angle, parallel lines, perpendicular lines) matches one-to-one with eight diagrams, from a double-arrowed line to a marked 90° intersection. The second half moves the same vocabulary into a labeled right trapezoid ABCD: students name its parallel segments, its perpendicular pair, its two right angles, and decide whether angle B is acute or obtuse. Answers included.
