NAME ______________________________ DATE _______________

DAILY PRACTICE

Which Angles Are Right Angles?

In each of the polygons below, there is at least one right angle. Find all of the right angles in each polygon and label them with an “R.”

  • 1 A four-sided polygon with two 90-degree angles, one 60-degree angle, and one 120-degree angle.

  • 2 A square.

  • 3 A triangle with one 90-degree angle, one 54-degree angle, and one 36-degree angle.

  • 4 A triangle with one 90-degree angle, one 13-degree angle, and one 77-degree angle.

  • 5 A five-sided polygon with two 90-degree angles, two 143-degree angles, and one 77-degree angle.

  • 6 A triangle with one 90-degree angle and two 45-degree angles.

Ongoing Review

  • 7 Suppose the arrow at the right is turned 90 degrees clockwise (right) three times. Which figure shows the new direction of the arrow?

    An arrow pointing right.

    • A An arrow pointing up.

    • B An arrow pointing right.

    • C An arrow pointing down.

    • D An arrow pointing left.

NOTE

Students identify right angles (90 degree angles).

MWI Angles


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Table of Contents

Investigations 3 in Number, Data, and Space®, Student Activity Book Unit 1 Arrays, Factors, and Multiplicative Comparison Unit 2 Generating and Representing Measurement Data Unit 3 Multiple Towers and Cluster Problems Unit 4 Measuring and Classifying Shapes Unit 5 Large Numbers and Landmarks Unit 6 Fraction Cards and Decimal Grids Unit 7 How Many Packages and Groups? Unit 8 Penny Jars and Towers