Finding Unknown Angles Using Addition and Subtraction
Grade 4•45 minutes•5.MG.3 The student will classify and measure angles and triangles, and solve problems, including those in context.
Learning Objective
I can solve word problems to find missing angle measures by adding or subtracting angles on a diagram.
Practice Questions
This lesson includes 7 practice questions to reinforce learning.
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1. Explain in your own words how you can find a missing angle measure if you know the total angle measure and the measure of one of the smaller angles that make up the total angle.
2. Draw a diagram showing two angles that add up to 90°. Label one angle as 30°. What is the measure of the other angle?
3. An artist is creating a design using angles. One angle measures 65° and another angle measures 40°. If the artist puts these two angles together, what is the measure of the total angle they create?
...and 4 more questions
Educational Video
Adding and Subtracting Angles: 4.MD.7
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