## MAFS.912.G-CO.3.10: Prove theorems about triangles; use theorems about triangles to solve problems. Theorems include: measures of interior angles of a triangle sum to 180°; triangle inequality theorem; base angles of isosceles triangles are congruent; the segment joining midpoints of two sides of a triangle is parallel to the third side and half the length; the medians of a triangle meet at a point.

There are 78 resources.
Title Description Thumbnail Image Curriculum Topics

## Math Examples Collection: Solving Equations Using Triangle Properties

Applications of Equations and Inequalities and Applications of Triangles

## Math Definitions Collection: Geometry Theorems and Postulates

Definition of a Triangle, Definition of an Angle, Right Triangles and Definition of a Line

## Math Clip Art Collection: Angles

### Overview

Angles and Applications of Angles and Planes

## Math Examples Collection: Geometric Proofs

### Ove

Parallel Lines and Definition of a Triangle

## Math Examples Collection: Equations with Angle Measures

Solving Multistep Equations, Applications of Angles and Planes and Applications of Quadrilaterals

## Definition--Theorems and Postulates--AAA Theorem

### Definition--Theorems and Postulates--AAA Theorem This is part of a collection of definitions of geometric theorems and postulates.

Definition of a Triangle

## Definition--Theorems and Postulates--AAS Theorem

### Definition--Theorems and Postulates--AAS Theorem This is part of a collection of definitions of geometric theorems and postulates.

Definition of a Triangle

## Definition--Theorems and Postulates--Alternate Interior Angles Theorem

### Definition--Theorems and Postulates--Alternate Interior Angles Theorem This is part of a collection of definitions of geometric theorems and postulates.

Definition of an Angle

## Definition--Theorems and Postulates--ASA Theorem

### Definition--Theorems and Postulates--ASA Theorem This is part of a collection of definitions of geometric theorems and postulates.

Definition of an Angle

## Definition--Theorems and Postulates--Converse of Same-Side Interior Angles Postulate

### Definition--Theorems and Postulates--Converse of Same-Side Interior Angles Postulate This is part of a collection of definitions of geometric theorems and postulates.

Definition of an Angle

## Definition--Theorems and Postulates--Converse of the Alternate Interior Angles Theorem

### Definition--Theorems and Postulates--Converse of the Alternate Interior Angles Theorem This is part of a collection of definitions of geometric theorems and postulates.

Definition of an Angle

## Definition--Theorems and Postulates--Converse of the Corresponding Angles Theorem

### Definition--Theorems and Postulates--Converse of the Corresponding Angles Theorem This is part of a collection of definitions of geometric theorems and postulates.

Definition of an Angle

## Definition--Theorems and Postulates--Corresponding Angles Theorem

### Definition | Theorems and Postulates | Corresponding Angles Theorem This is part of a collection of definitions of geometric theorems and postulates.

Definition of an Angle

## Definition--Theorems and Postulates--Same-Side Interior Angles Postulate

### Definition--Theorems and Postulates--Same-Side Interior Angles Postulate This is part of a collection of definitions of geometric theorems and postulates.

Definition of a Triangle

## Definition--Theorems and Postulates--SAS Similarity Theorem

### Definition--Theorems and Postulates--SAS Similarity Theorem This is part of a collection of definitions of geometric theorems and postulates.

Definition of a Triangle

## Definition--Theorems and Postulates--SAS Theorem

### Definition--Theorems and Postulates--SAS Theorem This is part of a collection of definitions of geometric theorems and postulates.

Definition of a Triangle

## Definition--Theorems and Postulates--SSS Postulate

### Definition--Theorems and Postulates--SSS Postulate This is part of a collection of definitions of geometric theorems and postulates.

Definition of a Triangle

## Math Clip Art--Angle Illustrations--Supplementary Angles--Labeled

### Math Clip Art--Angle Illustrations--Supplementary Angles--Labeled This is part of a collection of clip art images showing different types of angles. Each type of angle measure includes a labeled and unlabeled version.

Angles and Applications of Angles and Planes

## Math Clip Art--Angle Illustrations--Supplementary Angles--Unlabeled

### Math Clip Art--Angle Illustrations--Supplementary Angles--Unlabeled This is part of a collection of clip art images showing different types of angles. Each type of angle measure includes a labeled and unlabeled version.

Angles and Applications of Angles and Planes

## Math Example--Geometric Proofs--Example 1

### Math Example--Geometric Proofs--Example 1 This is part of a collection of math examples that focus on geometric proofs.

Parallel Lines and Definition of a Triangle

## Math Example--Geometric Proofs--Example 10

### Math Example--Geometric Proofs--Example 10 This is part of a collection of math examples that focus on geometric proofs.

Parallel Lines and Definition of a Triangle

## Math Example--Geometric Proofs--Example 11

### Math Example--Geometric Proofs--Example 11 This is part of a collection of math examples that focus on geometric proofs.

Parallel Lines and Definition of a Triangle

## Math Example--Geometric Proofs--Example 12

### Math Example--Geometric Proofs--Example 12 This is part of a collection of math examples that focus on geometric proofs.

Parallel Lines and Definition of a Triangle

## Math Example--Geometric Proofs--Example 13

### Math Example--Geometric Proofs--Example 13 This is part of a collection of math examples that focus on geometric proofs.

Parallel Lines and Definition of a Triangle

## Math Example--Geometric Proofs--Example 2

### Math Example--Geometric Proofs--Example 2 This is part of a collection of math examples that focus on geometric proofs.

Parallel Lines and Definition of a Triangle