Measure angles that are less than 180°. Distinguish between angle measure and length measurement.
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If you need to adapt or shorten this lesson for remote learning, we suggest prioritizing Anchor Task 2 (benefit from discussion) and Anchor Task 3 (benefits from worked example). Find more guidance on adapting our math curriculum for remote learning here.
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Fold Circle A and Circle B as you would to make a right-angle template. Trace the folded perpendicular lines. How many right angles do you see at the center of each circle? Did the size of the circle matter?
Grade 4 Mathematics > Module 4 > Topic B > Lesson 6 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..
Modified by Fishtank Learning, Inc.Below are two angles, $$\angle C$$ and $$\angle D $$.
Which angle is larger? How do you know?
Grade 4 Mathematics > Module 4 > Topic B > Lesson 6 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..
Modified by Fishtank Learning, Inc.What is the measure of the following angle?
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First, estimate the measure of each angle below. Then, use a protractor to find the measure, in degrees, of each angle below.
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