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Ch 15: 4th Grade Math: Introduction to Geometric Figures

About This Chapter

Check out this chapter's video lessons and quizzes on line segments, angle bisectors, the midpoint theorem and more. Each of these resources is designed to help your 4th grade student learn how to make geometric constructions.

4th Grade Math: Introduction to Geometric Figures - Chapter Summary

This collection of lessons can give your elementary school student a solid understanding of the geometry concepts needed to excel in his or her 4th grade math class. Video lessons introduce students to basic geometry terms and provide step-by-step instructions for dividing line segments, measuring angles and constructing geometric shapes like inscribed triangles and squares. There are also short quizzes to help you determine how well your student is absorbing this material.

Chapter Lessons and Objectives

Lesson Objective
Line Segments & Rays: Definition & Measurement Students discover the differences between rays and line segments.
Points, Lines & Angles in Geometry Students find out how to identify and label points, lines, line segments, rays and angles.
Make Geometric Constructions with Tools Instructors demonstrate methods for making geometric constructions using such tools as rulers, strings and reflective devices.
Practice Making Geometric Constructions with Tools Students get extra practice applying methods discussed in the previous lesson.
Geometric Constructions Using Lines and Angles This lesson explains how to draw line segments and angles using a pencil, straight edge and compass.
Line Segment Bisection and Midpoint Theorem: Geometric Construction Students learn how to use the midpoint theorem or a straight edge and compass to find a line segment's midpoint.
Dividing Line Segments into Equal Parts: Geometric Construction Instructors demonstrate the steps required to divide a line segment into equal parts using a compass.
Types of Angles: Vertical, Corresponding, Alternate Interior & Others Students examine the angle types created by the intersection of two lines and a transversal.
Measuring Complementary, Supplementary, Vertical and Adjacent Angles Students learn how the relationship between two angles can be used to determine their degrees.
Constructing an Angle Bisector in Geometry Instructors demonstrate techniques for using a compass and straightedge to divide an angle in half.
Constructing Equilateral Triangles, Squares and Regular Hexagons Inscribed in Circles Students learn the skills required to draw these inscribed figures.
Regular Polygons: Definition & Parts Students identify the parts of a polygon and learn to differentiate irregular polygons from regular polygons.

7 Lessons in Chapter 15: 4th Grade Math: Introduction to Geometric Figures
Line Segments & Rays: Definition & Measurement

1. Line Segments & Rays: Definition & Measurement

Watch this video lesson to learn the difference between a line segment and a ray. You will also learn how to measure and add line segments. Learn why you can't measure or add a ray.

Points, Lines & Angles in Geometry

2. Points, Lines & Angles in Geometry

After watching this video lesson, you should understand the basic terms that form the foundation of geometry. Learn what a point is, what a line is, what an angle is, and learn about a special type of angle called a right angle.

Geometric Constructions Using Lines and Angles

3. Geometric Constructions Using Lines and Angles

Watch this video lesson to learn about geometric construction and how you can copy line segments and angles without using any numbers. All you need is a straight edge and a compass.

Dividing Line Segments into Equal Parts: Geometric Construction

4. Dividing Line Segments into Equal Parts: Geometric Construction

Watch this video lesson to learn one way to easily divide any line segment into as many equal parts as you need. Also, learn where in real life this skill comes in handy.

Types of Angles: Vertical, Corresponding, Alternate Interior & Others

5. Types of Angles: Vertical, Corresponding, Alternate Interior & Others

In addition to basic right, acute, or obtuse angles, there are many other types of angles or angle relationships. In this lesson, we will learn to identify these angle relationships and discuss their measurements.

Constructing an Angle Bisector in Geometry

6. Constructing an Angle Bisector in Geometry

Watch this video lesson to learn a cool way to split an angle in half. You can use this method to split a pie slice in half where you can be sure each side is equal.

Regular Polygons: Definition & Parts

7. Regular Polygons: Definition & Parts

What makes a polygon a polygon? And what shapes are considered polygons? In this lesson, find out the answers to these questions and more as we learn all about polygons and their parts.

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