About This Chapter
Identifying Triangles - Chapter Summary
In this chapter, your 3rd, 4th or 5th grader can explore topics like the properties of triangles and how to classify triangles through fun video lessons. These videos don't require much time to watch, as the average length is under 10 minutes. Features like video transcripts and self-assessment quizzes allow 3rd-5th grade students to study the chapter material and assess their understanding of it.
Chapter Lessons and Objectives
|Triangles: Definition and Properties||Students learn what a triangle is as well as its parts.|
|Classifying Triangles by Angles and Sides||The instructor discusses types of triangles and how they're classified by their angles and sides.|
|Interior and Exterior Angles of Triangles: Definition & Examples||In this lesson, students learn how to identify triangles' interior and exterior angles.|
|How to Identify Similar Triangles||Students learn how to use shortcuts to identify similar triangles.|
|Angles and Triangles: Practice Problems||This lesson allows students to practice solving angle and triangle problems.|
|Practice Identifying Triangles||Students practice identifying the types of angles and triangles.|
1. Triangles: Definition and Properties
What makes a shape a triangle? In this lesson, we'll explore the definition of a triangle, then analyze the parts of triangles, including the vertices, base and height.
2. Classifying Triangles by Angles and Sides
Not all triangles are the same. There are equilateral, isosceles and scalene triangles. Then there are right, acute and obtuse triangles. In this lesson, we'll learn how to classify triangles using their sides and angles.
3. Interior and Exterior Angles of Triangles: Definition & Examples
Knowing just a few things about the interior or exterior angles of triangles is sometimes all you need to put all the pieces together. Find out more in this lesson.
4. How to Identify Similar Triangles
Similar triangles have the same characteristics as similar figures but can be identified much more easily. Learn the shortcuts for identifying similar triangles here and test your ability with a quiz.
5. Angles and Triangles: Practice Problems
Want more practice solving with angle pairs? How about more review for solving angles in triangles? Look no further. Get more practice here, and test your ability with a quiz.
6. Practice Identifying Triangles
After watching this video lesson, you will be able to identify all kinds of triangles. You'll learn the identifying factors of each type of triangle, including the kinds of angles and lines to look for.
Earning College Credit
Did you know… We have over 160 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.
To learn more, visit our Earning Credit Page
Transferring credit to the school of your choice
Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.
Other chapters within the 3rd-5th Grade Math: Practice & Review course
- Number Sense & Arithmetic
- Number Properties
- Estimation & Rounding
- Steps for Solving Math Word Problems
- Multiples of Whole Numbers
- Multiplication Skills Practice
- Division Skills Practice
- Simplifying Whole Number Expressions
- Understanding Algebraic Expressions
- Data & Graphs
- Probability & Statistics
- Units of Measurement
- Working with Geometric Figures
- Circle Types & Parts
- How to Measure Perimeter, Area & Volume
- Symmetry, Similarity & Congruence
- Polyhedrons & Geometric Solids
- Identifying & Working with Fractions
- Operations with Fractions
- Adding, Subtracting, Multiplying & Dividing Decimals
- Operations with Decimals
- Mixed Operations
- The Coordinate Graph
- How to Graph a Function
- Number Theory & Prime Factorization
- Rates, Ratios & Proportions