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Cogito

Grade 7 Math · Chapter 8 · Lesson 3

Practice Worksheet

Angle Pairs

Angles that add to 90 or to 180.

10 problems · about 18 minutes · 7.G.B.5

NameDate

Figure — use these to answer the problems

Change the angle and read its measure off the protractor.
030609012015018035°
The angle35
Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

3 problems

  1. From “Volume and Surface Area of Prisms”

    Base area 18, height 7. Volume?

    Answer

  2. From “Angle Pairs”

    Supplementary to 47?

    Answer

  3. From “Telling Area from Circumference”

    Edging a round rug. 1 for circumference, 2 for area.

    Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

  1. Supplement of 130°?

    Answer

  2. Complement of 40°?

    Answer

  3. Supplement of 65°?

    Answer

Build It Up

The same ideas with more to keep track of.

2 problems

  1. Two lines cross at 55°. What is the vertical angle?

    Answer

  2. That same crossing. What is the angle next to the 55°?

    Answer

Stretch Yourself

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

2 problems

  1. The Complement

    An angle is 25°. What is its complement, in degrees?

    Answer

  2. The Supplement

    An angle is 110°. What is its supplement, in degrees?

    Answer