A quadrilateral is any shape with 4 straight sides. Squares, rectangles, rhombuses and trapezoids are all quadrilaterals, and a square is both a rectangle and a rhombus.
quadrilateralany shape with 4 straight sides
rectanglea quadrilateral with 4 square corners
rhombusa quadrilateral with 4 equal sides
trapezoida quadrilateral with a pair of parallel sides
Watch for: Counting a shape with a curved side. Thinking a square turned on its point is no longer a square. Thinking a square can't also be a rectangle.
At home: Hunt for quadrilaterals around the house, like doors, tiles, books and windows, and name each kind.
Sample sheet and answer key
Luna's Space Adventure
Grade 3 · Quadrilaterals · 3.G.A.1
NameDate
Astronaut Luna is exploring a far-off corner of space. Solve each problem to help Luna's mission go smoothly!
Find the quadrilaterals
A quadrilateral has 4 straight sides.
True or false?
Circle one.
Every rectangle is a square.truefalse
A trapezoid is a quadrilateral.truefalse
Every square is a rectangle.truefalse
A rhombus has 4 sides the same length.truefalse
Not a rhombus or rectangle
Circle the quadrilaterals that are neither a rhombus nor a rectangle.
Sheet
Luna's Space Adventure
Grade 3 · Quadrilaterals · 3.G.A.1
Answer key
Astronaut Luna is exploring a far-off corner of space. Solve each problem to help Luna's mission go smoothly!
Find the quadrilaterals
A quadrilateral has 4 straight sides.
True or false?
Circle one.
Every rectangle is a square.truefalse
A trapezoid is a quadrilateral.truefalse
Every square is a rectangle.truefalse
A rhombus has 4 sides the same length.truefalse
Not a rhombus or rectangle
Circle the quadrilaterals that are neither a rhombus nor a rectangle.
Answer key
New problems every time, three levels (gentle, core and stretch), themes to pick from, a second page if you want one. Each sheet comes with an answer key and a one-page guide for grown-ups.
