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Number Trail Grade 3 / Week 12 / Monday
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Week 12 · Shapes and the end of the trail

Monday

Four-sided shapes
// Quadrilaterals, equal parts and a big review
⏱ about 15 min

Monday: Four-sided shapes

Ferris the Fox spreads his trail map on a stump.

"The last stop of the trail is Shape Hollow," he says.

"The signs there are cut into many shapes."

Bennie the Bear holds up a sign with four sides.

"Shapes with exactly four sides have a special name," says Bennie.

"They are called quadrilaterals." Ferris repeats the long word, smiling.

Learn it: quadrilaterals have 4 sides

A quadrilateral is any flat shape with exactly 4 straight sides.

Squares, rectangles and rhombuses are quadrilaterals.

Trapezoids and parallelograms are quadrilaterals too.

A rhombus

This is a rhombus. All 4 of its sides are the same length.

A four-sided shape with no equal sides

This shape has 4 sides of different lengths. It is still a quadrilateral.

COUNT THE SIDES
  • Read the question.
  • Tap your answer.
A trapezoidHow many sides does this shape have?
A pentagonHow many sides does this shape have?
A parallelogramHow many sides does this shape have?
A hexagonHow many sides does this shape have?
A rhombusHow many sides does this shape have?
IS IT A QUADRILATERAL?
  • Read the question.
  • Tap your answer.
A rectangleIs this shape a quadrilateral?
A triangleIs this shape a quadrilateral?
A trapezoidIs this shape a quadrilateral?
An octagonIs this shape a quadrilateral?
A four-sided shape with no equal sidesIs this shape a quadrilateral?
NAME THE SHAPE
  • Read the question.
  • Tap your answer.
A rhombusWhat shape is this?
A trapezoidWhat shape is this?
A parallelogramWhat shape is this?
A squareWhat shape is this?
ORDER BY NUMBER OF SIDES
  • Count the sides of each shape.
  • Put them from fewest sides to most.
11st
22nd
33rd
44th
SentenceTrue or false?
A quadrilateral has exactly 4 sides.?
A triangle is a quadrilateral.?
A trapezoid is a quadrilateral.?
A pentagon has 4 sides.?
WHY THIS EXERCISEA triangle has 3 sides and a pentagon has 5, so they are not quadrilaterals.
Try it
Look around your room for things with 4 sides.
Think of a door, a book, a window or a rug.
Count the sides of each one to check.
Draw three different quadrilaterals.

Super shape spotting! Tomorrow Ferris shows how shapes share attributes.