Curriculum / Math / 4th Grade / Unit 8: Shapes and Angles / Lesson 8
Math
Unit 8
4th Grade
Lesson 8 of 18
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Sketch angles of specified measure using a 180° protractor.
The core standards covered in this lesson
4.MD.C.5 — Recognize angles as geometric shapes that are formed wherever two rays share a common endpoint, and understand concepts of angle measurement:
4.MD.C.6 — Measure angles in whole-number degrees using a protractor. Sketch angles of specified measure.
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Ms. Kosowsky measured an angle that is 60°. Show what her angle looked like on the protractor below:
Protractor Rapporteur Degrees V3 is made available on Wikimedia Commons under the CC0 1.0 license. Accessed Feb. 20, 2018, 9:35 a.m..
Sketch angles that have each of the following angle measures:
a. 80°
b. 133°
Grade 4 Mathematics > Module 4 > Topic B > Lesson 7 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..
Problem Set
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Draw angles that measure the given number of degrees. Draw an arc to indicate the angle that was measured.
a. 55°
b. 130°
c. 78°
d. 104°
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Lesson 7
Lesson 9
Topic A: Lines and Angles
Identify and draw points, lines, line segments, rays, and angles.
4.G.A.1 4.MD.C.5
Identify and draw right, obtuse, and acute angles.
4.G.A.1
Identify and draw perpendicular lines.
Identify and draw parallel lines.
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Topic B: Measures of Angles
Use iteration with one physical nonstandard unit to measure benchmark angles.
4.MD.C.5 4.MD.C.6
Understand that an angle that turns through $${{1\over360}}$$ of a circle is called a “one-degree angle” and can be used to measure angles. Use a makeshift protractor to measure benchmark angles.
Measure angles that are less than 180° using a 180° protractor. Distinguish angle measure from other attributes.
Identify and measure angles as turns and recognize them in various contexts.
Topic C: Measures of Adjacent Angles
Decompose angles using pattern blocks.
4.MD.C.7
Solve problems involving the measure of two adjacent angles.
Solve problems involving the measure of more than two adjacent angles.
Measure and sketch angles that are greater than 180°.
4.MD.C.5 4.MD.C.6 4.MD.C.7
Topic D: Shapes and Lines of Symmetry
Analyze and classify triangles based on side length, angle measure, or both.
4.G.A.1 4.G.A.2
Draw triangles from given criteria.
Analyze and classify quadrilaterals based on parallel and perpendicular lines and the presence or absence of angles of a specified size.
Draw quadrilaterals from given criteria.
Identify and draw lines of symmetry in two-dimensional figures.
4.G.A.3
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