# Geometry

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This geometry section will help your child to become familiar with the basic concepts of planes, spaces, points, lines, the x-y-z coordinate system, angles, circle geometry, perimeters, area, and volume.

You will find a printable graph paper generator here that will assist when working on the examples in this section.

## What else is in the geometry section?

There is a listing of over 40 geometry worksheets, each one formatted for easy printing and with a built-in answer key.

Basic geometry terms are defined. For example, those associated with lines, angles, triangles, and the like.

 There are a number of 2D geometry shapes that are described and illustrated. Some of the more common 3D shapes are also illustrated. There are explanations and examples of different types of quadrilaterals. You will also find a lesson on lines of symmetry together with activities and related worksheets that will help to develop an understanding of symmetry.
 Some of the more common geometry formulas used for calculating circumference, area, and volume are listed. A more detailed exploration of calculating perimeter for various shapes is provided. Calculating area is covered along with an explanation of the various units of measurement associated with area. There is a illustrated explanation of how to calculate volumes of cubes and rectangular prisms. Dilations, or size transformations are explained and illustrated. Includes guidance on how to calculate and plot transformations on a cartesian plane. The congruence lesson covers congruent triangles and other shapes. It introduces the concept of transformations. The lesson on transformations includes translations, rotations, and reflections. The effect of these transformations on the cartesian coordinates of various figures is explored. There are lessons on coordinate graphing. Coordinate Graphing System explores how x and y-axes on a grid are used to locate the coordinates of ordered pairs. Coordinate Graphing of Real-World Problems shows how ordered pairs are plotted and how resultant straight lines can be generated. The foundation lesson on angles explains and illustrates how angle measurement is related to parts of a circular rotation. Include guidance on classifying angles. e.g. acute, right, obtuse. Guidance with worksheets on how to use a protractor to measure angles and how to draw angles using a protractor. A lesson with worksheets on how to calculate unknown angles by adding and subtracting with adjacent angles. There are two lessons on angles and their relationships. The first includes a look at supplementary, corresponding, and alternate angles and the second uses these relationships to find missing angles. The lesson on similarity covers similar triangles and other similar shapes. Pythagoras' Theorem is introduced with an explanation and a worksheet. How to find the distance between two points is covered with guidance and several examples showing how, given two coordinates, the distance between them can be calculated.

Note: Each of the sub-sections described above includes a listing of related geometry worksheets for practice with the concepts.

Select from the links above or from the menu options to select the geometry resources that you wish to review or use.

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