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Illustrative Math
Grade 7
Let’s look at angles that are not right next to one another.
Illustrative Math Unit 7.7, Lesson 3 (printable worksheets)
The following diagrams explain what are vertical angles.
Given a and b are numbers, and a + b = 180, which statements also must be true?
a = 180 - b
a - 180 = b
360 = 2a + 2b
a = 90 and b = 90
Use any useful tools in the geometry toolkit to identify any pairs of angles in these figures that are complementary or supplementary.
Use a straightedge to draw two intersecting lines. Use a protractor to measure all four angles whose vertex is located at the intersection.
Compare your drawing and measurements to the people in your group. Make a conjecture about the relationships between angle measures at an intersection.
Find the measure of the angles in one column. Your partner will work on the other column. Check in with your partner after you finish each row. Your answers in each row should be the same. If your answers aren’t the same, work together to find the error and correct it.
The Open Up Resources math curriculum is free to download from the Open Up Resources website and is also available from Illustrative Mathematics.
Try out our new and fun Fraction Concoction Game.
Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.
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