About This Chapter
Properties of Geometric Shapes - Chapter Summary
Stir up your memory of the definition of triangles, obtuse angles, and acute angles by viewing quick video lessons. Use our multiple-choice self-assessments to test your understanding of the characteristics of congruent shapes. When you have reached the end of this chapter, you will have your memory of the following items:
- Points and angles
- Parallel and transverse lines
- Definition of an obtuse angle, straight angle, acute angle, and triangle
- Explanation of geometric basic shapes
- Properties of rectangles, rhombuses, and other shapes
- The perimeter of rectangles and triangles
- Congruent shapes and their properties
- Math transformations
- Methods for visually solving geometry problems
The quizzes found in this chapter are short. In addition to the video lessons, we also have video transcripts that you can read through. Each transcript contains bold keywords to let you know the most important information. If you need to go back to certain areas of the videos, use the links below them to do so.
1. 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.
2. Parallel, Perpendicular and Transverse Lines
What are the different types of lines? Where are they visible in the real world and how can you recognize them? Find out here and test your knowledge with a quiz.
3. Parallel Lines: How to Prove Lines Are Parallel
Watch this video lesson to learn how you can prove that two lines are parallel just by matching up pairs of angles. Learn which angles to pair up and what to look for.
4. What is an Obtuse Angle? - Definition & Examples
In this lesson, you'll learn what angles, right angles, and obtuse angles are; you'll see a few examples of different obtuse angles. Test your knowledge with a brief quiz once you've completed the lesson.
5. What is a Straight Angle? - Definition & Example
This lesson will be an explanation of what a straight angle is. It will include several examples that fully demonstrate the straight angle in contrast with other angles.
6. What is an Acute Angle? - Definition, Description & Examples
In this lesson, you'll learn what makes an angle acute and see a few different examples of them. After the lesson, you can test your new knowledge with a brief quiz.
7. Overview of the Basic Shapes in Geometry
Watch this video lesson to learn about some basic shapes in geometry. These are the shapes that you will come across most often in math. Watch as triangles, rectangles, pentagons, and circles come by.
8. Properties of Shapes: Rectangles, Squares and Rhombuses
What's the difference between a square and a rectangle? What about a rhombus and a square? In this lesson, we'll look at the properties of these shapes.
9. 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.
10. Perimeter of Triangles and Rectangles
Without realizing it, we calculate and use the perimeter of triangles and rectangles in regular everyday situations. Learn more about the perimeter of triangles and rectangles in this lesson, and test your knowledge with a quiz.
11. Properties of Congruent and Similar Shapes
In this lesson, we'll look at triangles, rectangles and other shapes that share properties. This includes both congruent and similar shapes. We'll also practice identifying the missing properties of these shapes.
12. Transformations in Math: Definition & Graph
In geometry, transformation refers to the movement of objects in the coordinate plane. This lesson will define and give examples of each of the four common transformations and end with a quiz to make sure you are moving in the right direction.
13. How to Solve Visualizing Geometry Problems
A picture is worth a thousand words, but sometimes drawing that picture can be like doing origami with your eyes closed. Practice translating complex problems into simple, meaningful images in this lesson.
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