Grade 3 Geometry Worksheets: Quadrilaterals, Right Angles, Perimeter, and Area

These Grade 3 geometry worksheets dig into quadrilaterals and the space shapes take up. On the quadrilateral pages a child sorts four-sided shapes into squares, rectangles, and rhombuses, learning what makes each group its own kind. Right-angle pages send the child hunting for square corners, and a set of mirror-line pages counts how many lines of symmetry a shape has. The measuring pages walk the edge of a shape to find its perimeter, and others show that two shapes can cover the same area while looking completely different, or share a perimeter while holding different space inside. Sorting quadrilaterals, finding right angles, and measuring perimeter and area are the third-grade geometry skills these pages cover. The figures are drawn on clear grids, so a child can count the units along each side and check perimeter and area square by square, without any hurry.

This set names shapes and then measures them. A child sorts quadrilaterals by their sides and corners, marks the right angles, counts the units around a shape for its perimeter, and counts the squares inside for its area. The grids are clear and the steps are short, so each count is easy to follow and easy to check.

Once your child can sort quadrilaterals and measure perimeter and area, you can print more of these geometry worksheets as a PDF and keep working on paper. Everything is free, with no sign-up and no account, and there are no timers or scores to rush a careful count of the units. A wrong total is just a reason to walk the edge again. You can revisit the Grade 2 geometry worksheets for a lighter look at faces and edges, or browse the full set of printable geometry worksheets to find today's page.