DrillPre-K to K
Shape recognition worksheets
Circle or color the circles, squares, triangles and rectangles hidden in each row.
Angle relationships worksheets
Find an unknown angle: complementary, supplementary, vertical, in a triangle, or between parallel lines.
About this worksheet
Each picture is drawn to scale and gives one angle in degrees. Students find the angle marked x using one fact: angles in a right angle add to 90, angles on a straight line add to 180, vertical angles are equal, the angles of a triangle add to 180, and parallel lines cut by a transversal make equal or supplementary angles.
Pick one relationship to practice or mix all five. Every answer is a single whole number of degrees. The solved example names the rule it uses.
Printing
US Letter or A4, portrait: choose your paper size above. Print at 100 percent (actual size). Use "Black and white" for the copier, or "Color" for display pages and mini books.
Popular versions
Ready-made settings for common topics.
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