Mathematics Geometry Procedural 9–10 yrs

Lines, Rays & Angles

直线、射线与角

Description

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

Mastery Evidence

✓ Draw a pair of perpendicular lines and a pair of parallel lines
✓ Identify all pairs of parallel sides in a trapezoid
✓ Mark a right angle, an acute angle, and an obtuse angle in a given figure

Assessment Prompt

If your child is given a piece of paper and a ruler, can they draw a line segment, mark a point, and then draw another line through that point that runs perfectly parallel to the first?