ALEX Classroom Resource

  

Grade 4 Mathematics Module 4, Topic C: Problem Solving With the Addition of Angle Measures

  Classroom Resource Information  

Title:

 Grade 4 Mathematics Module 4, Topic C: Problem Solving With the Addition of Angle Measures

URL:

 https://www.engageny.org/resource/grade-4-mathematics-module-4-topic-c-overview

Content Source:

 EngageNY
Type: Lesson/Unit Plan

Overview:

In Topic C, students use concrete examples to discover the additive nature of angle measurement.

Students will:

  • decompose angles using pattern blocks.
  • use the addition of adjacent angle measures to solve problems using a symbol for the unknown angle measure.
  • use the addition of adjacent angle measures to solve problems using a symbol for the unknown angle measure.
Content Standard(s):
Mathematics
MA2019 (2019)
Grade: 4
26. Decompose an angle into non-overlapping parts to demonstrate that the angle measure of the whole is the sum of the angle measures of the parts.

a. Solve addition and subtraction problems on a diagram to find unknown angles in real-world or mathematical problems.
Unpacked Content
Evidence Of Student Attainment:
Students:
  • When given the measures of two adjacent angles, find the measure of the larger angle formed.
  • Given one angle measure, composed of two smaller angles and given the measure of one of the smaller angles, find the second unknown angle measure.
  • Decompose the angle as the sum of two angle parts.
  • Use addition and subtraction equations to represent and solve problems involving angle measurements.
Teacher Vocabulary:
  • Decompose
  • Angle
  • Non-overlapping
  • Angle measure
  • Sum
  • Diagram
  • Adjacent
  • Compose
  • Degrees
Knowledge:
Students know:
  • Angles are measured in degrees from 0 to 360.
  • Protractor orientation does not affect an angle measurement.
Skills:
Students are able to:
  • Decompose an angle into non-overlapping parts and demonstrate that the sum of the angle measure parts is the same as the measure of the whole angle.
  • Use addition and subtraction to find unknown angles on a diagram in real-world or mathematical problems.
Understanding:
Students understand that:
  • The rotation of an angle is measured by the number of one-degree angles that exactly cover the rotation of the angle.
  • Angle measurement is additive of the non-overlapping parts of a decomposed angle.
Diverse Learning Needs:
Essential Skills:
Learning Objectives:
M.4.26.1: Identify straight angles.
M.4.26.2: Recognize angle measures such as 45o, 90o, 180o, 270o, 300o.
M.4.26.3: Recall basic addition and subtraction facts.
M.4.26.4: Skip count by fives and tens.

Prior Knowledge Skills:
  • Build and draw shapes to possess defining attributes.
  • Express the length of an object as a whole number of length units by laying multiple copies of a shorter object (the length unit) end to end; understand that the length measurement of an object is the number of same-size length units that span it with no gaps or overlaps.
  • Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles).
  • Identify a rectangle.
  • Express the length of an object as a whole number of length units by laying multiple copies of a shorter object (the length unit) end to end; understand that the length measurement of an object is the number of same-size length units that span it with no gaps or overlaps.
  • Define halves, thirds, fourths, quarters, whole, parts (shares) and equal.
  • Distinguish between equal and non-qual parts.
  • Model partitioning circles and rectangles.
  • Decompose pictures made of simple shapes.
  • Identify squares, circles, triangles and rectangles.
  • Explore shapes or figures that can be decomposed into smaller equal parts.
Alabama Alternate Achievement Standards
AAS Standard:
M.AAS.4.24 Recognize and Identify angles in geometric shapes as larger or smaller.
Tags: addition, adjacent angle, angle, decompose, diagram, measure, realworld, subtraction, unknown angle
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Comments

There are three lessons in this topic.

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  This resource provided by:  
Author: Hannah Bradley
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