ALEX | Alabama Learning Exchange

Grade 4 Mathematics Module 4, Topic D, Lesson 13

Classroom Resource Information

Title:

Grade 4 Mathematics Module 4, Topic D, Lesson 13

URL:

https://www.engageny.org/resource/grade-4-mathematics-module-4-topic-d-lesson-13

Content Source:

EngageNY

Type:

Lesson/Unit Plan

Overview:

In this lesson, students will analyze and classify triangles based on side length, angle measure, or both.

Content Standard(s):

Mathematics
MA2019 (2019)
Grade: 5

21. Classify triangles according to side length (isosceles, equilateral, scalene) and angle measure (acute, obtuse, right, equiangular).

Unpacked Content

Evidence Of Student Attainment:

Students:
When given a variety of triangles,

Measure sides and angles to classify triangles based on side length and angle measure.

Teacher Vocabulary:

Classify
Polygon
Side measure
Angle measure
Isosceles
Equilateral
Scalene
Acute
Obtuse
Right
Equiangular

Knowledge:

Students know:

Measurable attributes of triangles include length of side and angle measures.
Appropriate tools and units of measure for length of side and angle measures.

Skills:

Students are able to:

Classify triangles according to side measures and angle measures.

Understanding:

Students understand that:

triangles can be described and classified by their properties of side length, angle size, or cross-classify to include both side length and angle size.

Diverse Learning Needs:

Essential Skills:

Learning Objectives:
M.5.21.1: Define isosceles, equilateral, scalene, right and equiangular triangles; obtuse, acute, and right angle; vertex/vertices.
M.5.21.2: Identify a right triangle.
M.5.21.3: Sort and categorize shapes.
M.5.21.4: Recognize and draw shapes having specified attributes.

Prior Knowledge Skills:

Recall the vocabulary of shapes (labels, sides, faces, vertices, etc.).
Recognize and draw shapes having specified attributes such as a given number of angles.
Build and draw shapes to possess defining attributes.
Sort shapes into categories.
Define side, angle, face, closed, and open.
Use vocabulary related to shape attributes.
Examples: sides, angles, face, closed, open.
Trace shapes.
Sort triangles, quadrilaterals, pentagons, hexagons, and cubes.
Explore triangles, quadrilaterals, pentagons, hexagons, and cubes.

Alabama Alternate Achievement Standards

AAS Standard:
M.AAS.5.20 Identify a point on a horizontal number line representing the horizontal x-axis (no greater than 5) and identify a point on a vertical number line representing the y-axis (no greater than 5).

Tags:

acute, analyze, angle measure, classify, equiangular, equilaterial, isosceles, obtuse, right, scalene, side length, triangle

License Type:

Custom Permission Type
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Accessibility

Text Resources: Content is organized under headings and subheadings

Comments

This resource is free for teachers to access and use. All resources required for the lessons are available to print from the site.

This resource provided by:

Author:

Hannah Bradley

ALEX Classroom Resource

Grade 4 Mathematics Module 4, Topic D, Lesson 13