# Ch 4: Properties of Triangles: Homework Help

### About This Chapter

## How it works:

- Identify which concepts are covered on your properties of triangles homework.
- Find videos on those topics within this chapter.
- Watch fun videos, pausing and reviewing as needed.
- Complete sample problems and get instant feedback.
- Finish your triangle properties homework with ease!

## Topics from your homework you'll be able to complete:

- Identifying the parts of a triangle
- Measuring the areas of rectangles and triangles
- Classifying triangles
- Measuring the perimeters of rectangles and triangles
- Defining exterior and interior angles in triangles
- Identifying similar triangles
- Solving problems with angles and triangles
- Constructing medians of triangles
- Defining altitudes, angle bisectors and medians in triangles
- Constructing triangles
- Describing properties of concurrent lines in triangles
- Understanding characteristics of dilations

### 1. Area of Triangles and Rectangles

How do you find out the area of rectangles and triangles? Learn how in this lesson! We'll look at the formulas, then practice solving problems for each shape.

### 2. 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.

### 3. 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.

### 4. 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.

### 5. 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.

### 6. 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.

### 7. 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.

### 8. Constructing the Median of a Triangle

If you have one triangle and want to divide it, you can use a median line. Medians have special geometric properties that we'll learn about in this lesson.

### 9. Median, Altitude, and Angle Bisectors of a Triangle

Line segments in triangles are just clutter; they have special names and qualities depending on how they're drawn. In this lesson, we'll learn about medians, altitudes and angle bisectors.

### 10. Constructing Triangles: Types of Geometric Construction

When you're asked to construct a triangle, it's time to break out that compass and straight edge! In this lesson, find out how to construct triangles no matter what you're given.

### 11. Properties of Concurrent Lines in a Triangle

Centroids, orthocenters, incenters, circumcenters, oh my! Don't worry though. In this lesson, we master the various terms for concurrent lines in triangles and match them to altitudes, angle bisectors, perpendicular bisectors and medians.

### 12. Perfect Numbers: Definition, Formula & Examples

There are 48 known perfect numbers, the first four of which were discovered over 2,000 years ago. In this lesson, you'll learn exactly what constitutes a perfect number as well as the formula used to calculate these numbers and examples of how this formula works.

### 13. Pyramid in Math: Definition & Practice Problems

A pyramid is a 3-dimensional geometric shape formed by connecting all the corners of a polygon to a central apex. This lesson will discuss the different types of pyramids and formulas surrounding them.

### 14. Supplementary Angle: Definition & Theorem

There are many important angle pairs in geometry. In this lesson, we'll learn about supplementary angles, including what they are, where they are used, and why you need to know about them.

### 15. Transversal in Geometry: Definition & Angles

Transversal lines are like puzzle pieces in geometry. Once you have the big picture of this puzzle, transversals can be fun problems to solve. In this lesson, we explore the many angles of transversal lines and review with a quiz.

### 16. What is a Hexagon? - Definition, Area & Angles

Hexagons are interesting geometric shapes and appear in many areas of nature and life. In this lesson, learn all about the hexagon, its angles, and how to find its area. When you have finished, review what you've learned with our short self-assessment quiz!

### 17. What is a Right Angle? - Definition & Formula

In this lesson, you will learn about the properties that identify right angles. You will also discover where right angles can be found and learn about what makes them so useful. You can then test your knowledge with a quiz.

### 18. 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.

### 19. 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.

### 20. What Is an Obtuse Triangle? - Definition & Area Formula

In this lesson, you'll review what an obtuse angle is and find out how it makes obtuse triangles unique. You'll also discover the formula for the area of an obtuse triangle. Then, you can test your knowledge with a brief quiz.

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### Other Chapters

Other chapters within the High School Geometry: Homework Help Resource course

- Foundations of Geometry: Homework Help
- Logic in Mathematics: Homework Help
- Introduction to Geometric Figures: Homework Help
- Triangles, Theorems and Proofs: Homework Help
- Parallel Lines and Polygons: Homework Help
- Similar Polygons: Homework Help
- Quadrilaterals: Homework Help
- Circular Arcs and Circles: Homework Help
- Conic Sections: Homework Help
- Geometric Solids: Homework Help
- Analytical Geometry: Homework Help
- Introduction to Trigonometry: Homework Help