Lesson 13
using equations to solve for unknown angles
Unit 3
writing and solving equations
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13.1 Warm Up: Is This Enough?
Tyler thinks that this figure has enough information to figure out the values of a and b.
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Learning Targets
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13.2 What Does It Look Like?
Elena and Diego each wrote equations to represent these diagrams. For each diagram, decide which equation you agree with, and solve it. You can assume that angles that look like right angles are indeed right angles.
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13.2 What Does It Look Like?
Elena and Diego each wrote equations to represent these diagrams. For each diagram, decide which equation you agree with, and solve it. You can assume that angles that look like right angles are indeed right angles.
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13.3 Calculate the Measure
Find the unknown angle measures. Show your thinking. Organize it so it can be followed by others.
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13.3 are you ready for more?
The diagram contains three squares. Three additional segments have been drawn that connect corners of the squares. We want to find the exact value of a+b+c.
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Lesson Summary
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13.4 Cool Down: in words
Here are three intersecting lines.
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Reflections
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Practice Problems
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Lesson Video
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