Date: Three to Measure

Student Name: _____________________________

Date: ________________

Three to Measure • • • •

Distribute one Triangle Card to each member of the group. Use a protractor to measure each angle of the triangle on your card to the nearest degree. Record the angle measures in the appropriate table. Record the angle measures determined by your group members. Triangle 1 Angle

Measure

A B C Sum of the Measures Triangle 2 Angle

Triangle 3

Measure

Angle

A

A

B

B

C

C

Sum of the Measures

Sum of the Measures

Measure

If you were to draw an obtuse triangle on the back of your paper and measure the three angles, what do you predict the sum of the measures will be? Why?

Communicating about Mathematics Without measuring the other two triangles, how can you determine if your partners’ measurements are reasonable?

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© 2015 Region 4 Education Service Center

Triangle Cards Cut along the dotted lines. One set of cards is provided.

Triangle 1 B

B

C

A Triangle 3

B

A

C

© 2015 Region 4 Education Service Center

204

A

Triangle 2

C