# Chapter 1: Basics of Geometry

Difficulty Level:

**Basic**Created by: CK-12

## Introduction

In this chapter, students will learn about the building blocks of geometry. We will start with what the basic terms: point, line and plane. From here, students will learn about segments, midpoints, angles, bisectors, angle relationships, and how to classify polygons.

Chapter Outline

- 1.1.
## Basic Geometric Definitions

- 1.2.
## Distance Between Two Points

- 1.3.
## Congruent Angles and Angle Bisectors

- 1.4.
## Midpoints and Segment Bisectors

- 1.5.
## Angle Measurement

- 1.6.
## Angle Classification

- 1.7.
## Complementary Angles

- 1.8.
## Supplementary Angles

- 1.9.
## Linear Pairs

- 1.10.
## Vertical Angles

- 1.11.
## Triangle Classification

- 1.12.
## Polygon Classification

### Chapter Summary

## Summary

This chapter begins with the basic components of Euclidean Geometry. From the introductory definition of points, lines, and planes it builds to a discussion of classifying figures such as angles, triangles, and polygons. Measurement of distances and angles are also covered. Different types of angle relationships are compared and explored, such as complementary angles, supplementary angles and linear pairs.

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Description

This chapter introduces students to the basic elements of geometry,
including points, lines, angles, and polygons. Also covered are bisectors, midpoints,and segments.

Difficulty Level:

Basic
Tags:

angle
Angle Addition Postulate
angle pairs
(21 more)
bisector
CK.MAT.ENG.SE.1.CK-12-Concept-Basic-Geometry.1
collinear
compass
coplanar
distance
line
Linear Pair Postulate
measure
Midpoint Postulate
plane
point
polygons
postulates
Protractor Postulate
ray
Ruler Postulate
Segment Addition Postulate
theorem
triangles
vertex

Subjects:

Search Keywords:

triangles
distance
vertex
(21 more)
Linear Pair Postulate
angle pairs
bisector
Midpoint Postulate
compass
Angle Addition Postulate
Protractor Postulate
angle
Segment Addition Postulate
Ruler Postulate
measure
theorem
postulates
ray
coplanar
collinear
plane
line
point
CK.MAT.ENG.SE.1.CK-12-Concept-Basic-Geometry.1

Date Created:

Feb 24, 2012
Last Modified:

Nov 06, 2015
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