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Cogito

Grade 4 Math · Chapter 7 · Lesson 5

Practice Worksheet

Sorting Shapes by Their Angles

What a shape has decides what it is called.

10 problems · about 15 minutes · 4.G.A.2

NameDate

Figure — use these to answer the problems

Turn the shape. The name does not change.

Trapezoid

Straight sides

4

Corners

4

Turn it0
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

2 problems

  1. From “Lines, Rays, and Segments”

    At how many degrees do perpendicular lines cross?

    Answer

  2. From “Angles Add Together”

    A right angle split into 25 and one more part. How big is that part?

    Answer

Warm Up

Straightforward practice. Get the method working first.

4 problems

  1. How many right angles can a triangle have?

    Answer

  2. What names a shape?

    • What it has: sides, angles, parallel lines.
    • Which way up it is.

  3. How many right angles does a rectangle have?

    Answer

  4. How many pairs of parallel sides does a rectangle have?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. Is every rectangle also a square?

    • No. Its sides need not be equal.
    • Yes.

  2. Does turning a shape change its name?

    • No.
    • Yes.

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

2 problems

  1. The Square

    Is every square also a rectangle?

    • Yes. It has 4 right angles.
    • No.

  2. The Triangle

    How many right angles can a triangle have?

    Answer