CK-12 Foundation
Ck 12: Math Grade 3
Browse resources related to third-grade math standards. Click on a topic for interactive lessons, videos, and extra practice.
CK-12 Foundation
Ck 12: Math Grade 4
Browse resources related to fourth-grade math standards. Click on a topic for interactive lessons, videos, and extra practice.
CK-12 Foundation
Ck 12: Math Grade 5
Browse resources related to fifth-grade math standards. Click on a topic for interactive lessons, videos, and extra practice.
Math Drills
Math Drills: Geometry Worksheets
Download these worksheets to sharpen your geometry skills. Sheets focus on angles, coordinate geometry, triangles, quadrilaterals, transformations, and three-dimensional geometry, and more.
Cuemath
Cuemath: Quadrilaterals
Explore the world of quadrilaterals and their properties. Find answers to questions like what are quadrilaterals, how they are formed, easy ways to identify them, and commonly seen quadrilaterals around us.
Cuemath
Cuemath: Equilateral
Learn all about the basic properties of equilateral. This lesson targets the meaning of equilateral, shows how to construct equilateral shapes, explores some of the equilateral shapes and properties, and how to apply them while solving...
E-learning for Kids
E Learning for Kids: Math: Russian Toy Store: 2 D Shapes
Mattie and her four sisters are visiting a toy store. Can you help them find different shapes in the toy store?
AAA Math
Aaa Math: Geometry
A comprehensive tutorial from AAA Math that contains explanations, interactive practices and challenging games.
Math.com
Math.com: Quadrilaterals
The lesson investigates types of quadrilaterals. Definitions, examples, and a worksheet are available.
Los Angeles County Office of Education
Los Angeles County Office of Education: Quadrilateral Quest
Use your knowledge of properties of quadrilaterals to correctly match quadrilaterals.
University of Illinois
University of Illinois Urbana Champaign: The Geometry Center: Area of Quadrilaterals
Formulas on calculating the area of a general quadrilateral and special cases of quadrilaterals.
Wolfram Research
Wolfram Math World: Kite
MathWorld provides the definition and the area formula for a kite.
Wolfram Research
Wolfram Math World: Rectangle
MathWorld provides the definition of a rectangle and the area formula of a rectangle.
Texas Instruments
Texas Instruments: Investigating Segments in a Quadrilateral
In this activity, students use the tools of Cabri Jr to test their knowledge of geometry. They investigate the properties of the shape formed by connecting the midpoints of adjacent sides of a quadrilateral.
Texas Instruments
Texas Instruments: Cyclic Quadrilaterals
Students construct cyclic quadrilaterals and investigate their properties. They determine which quadrilaterals from the quadrilateral hierarchy are cyclic.
Texas Instruments
Texas Instruments: Measuring Angles in a Quadrilateral
In this activity, use an interactive, and investigative approach to determining the sum of the interior angles of a quadrilateral. They use Cabri Jr. to draw, measure, and calculate the characteristics of the angles of quadrilaterals.
Texas Instruments
Texas Instruments: Exploring Quadrilateral Properties Using Cabri
Students can use Cabri Jr. to learn about the properties of quadrilaterals as well as learn about the relationships between quadrilaterals.
Texas Instruments
Texas Instruments: Investigating Properties of Kites
In this activity, students construct kites and investigate their properties. They also relate the properties to squares and rhombi.
Texas Instruments
Texas Instruments: Classifying Quadrilaterals
Students will be sent ordered pairs through lists using the TI-Navigator. These pairs will then be graphed as a line graph and students will classify the shape of the quadrilateral and justify their choice.
Texas Instruments
Texas Instruments: Investigating Properties of the Diagonals of Quadrilaterals
In this activity, students will explore the properties of the diagonals of various quadrilaterals. They will use a quadrilateral hierarchy chart to examine the relationship between the quadrilaterals.
Texas Instruments
Texas Instruments: What Quadrilateral Is It?
Students will algebraically determine what type of quadrilateral that is pictured in the activity center.
Texas Instruments
Texas Instruments: Discovering the Quadrilateral Properties
This activity will use Cabri Jr. to allow students' the ability to discover all of the properties of each quadrilateral, rather than simply copying them out of a textbook.
Texas Instruments
Texas Instruments: Exploring Quadrilaterals With Cabri Jr.
Students can use Cabri Jr. software on their TI-83/84 calculator to connect consecutive midpoints of different quadrilaterals and analyze and determine characteristics of the new quadrilateral formed.
Texas Instruments
Texas Instruments: Investigating Quadrilaterals
Students will create a variety of quadrilaterals using the GEOBOARD APP and identify critical attributes.