Unit 9 Contents

20. Grace drew this:
    
    She made ∠CHB 70°.  Look at Grace's thinking to determine the measurement of ∠CHM.
    
1. Do you agree with Grace? Measure to check her calculations.
2. Write a different number sentence to determine the measurement of ∠CHM.
3. What is the measure of ∠DLN ?
4. Write a number sentence to calculate the measurement of ∠DLN.

Use the Draw and Solve Problems with Angles pages in your Student Activity Book to practice drawing angles and using number sentences to determine the measurement of angles.