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Illustrative Math
Grade 7
Let’s figure out missing angles using equations.
Illustrative Math Unit 7.7, Lesson 5 (printable worksheets)
The following diagrams explain how to write an equation to represent a relationship between angle measures and solve the equation to find unknown angle measures.
Tyler thinks that this figure has enough information to figure out the values of a and b.
Do you agree? Explain your reasoning.
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.
Find the unknown angle measures. Show your thinking. Organize it so it can be followed by others.
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.
The Open Up Resources math curriculum is free to download from the Open Up Resources website and is also available from Illustrative Mathematics.
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