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# ZingPath: Triangles and Their Parts

## Types of Triangles              Searching for

## Triangles and Their Parts

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Explore the full path to learning Triangles and Their Parts

### Lesson Focus

#### Types of Triangles

Geometry

Different triangles are analyzed and classified by varying the side lengths and angle measurements.

### Now You Know

After completing this tutorial, you will be able to complete the following:

• Classify triangles.
• Analyze characteristics and properties of triangles and develop mathematical arguments about their geometric relationships.

### Everything You'll Have Covered

In order for students to truly grasp the changes of the triangle in the Activity Object, they should know that the sum of the angles of a triangle is 180o and be able to find a missing angle of a triangle.

The following key vocabulary terms will be used throughout this Activity Object:

• acute - an angle measuring less than 90o. A triangle can also be classified as acute when one angle of the triangle is measures less than 90o.
• angle - two rays that share the same endpoint and form an angle. • angle measure - angles are measured in degrees (o). The sum of the angle measures of a triangle is 180o.
• classify - to arrange or organize according to class or category.
• congruent - exactly equal in size and shape. A pair of angles and/or side measures can be considered congruent.
• • equilateral - a triangle with three congruent angles and side lengths.
• • isosceles - a triangle with two congruent angles and side lengths.
• • obtuse - an angle measuring more than 90o. A triangle can also be classified as obtuse when one angle of the triangle is measures more than 90o.
• right - an angle measuring exactly 90o. A triangle can also be classified as right when one angle of the triangle is measures exactly 90o.
• scalene - a triangle with three incongruent angle measures.
• • triangle - a polygon with three angles and three sides.

### Tutorial Details

 Approximate Time 10 Minutes Pre-requisite Concepts Students should be familiar with angles and triangles. Course Geometry Type of Tutorial Skills Application Key Vocabulary angles, angle measures, classify