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.
OER Commons
Oer Commons: Exploring the Properties of a Triangle
In this lesson, middle schoolers explore properties of triangles. They fold paper to make a triangle and measure its angles. Students also draw triangles with given conditions. Included are examples, discussion questions, and closing...
Government of Alberta
Learn Alberta: Math Interactives: Classifying Quadrilaterals
This multimedia that includes a short video [1:19] and other interactive activities on Learn Alberta math resource looks at real-world examples of shape classification in the investigation and solving of crimes. The accompanying...
Khan Academy
Khan Academy: Quadrilaterals Review
After reviewing the properties of different quadrilaterals, students answer questions about each type.
CK-12 Foundation
Ck 12: Elem Math: Identifying Quadrilaterals by Description
[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to identify which type of quadrilateral matches the description given. Includes video demonstrating a sample problem...
CK-12 Foundation
Ck 12: Interactive Geometry: 4.8 Applications of Quadrilateral Theorems
Explore quadrilateral properties and threorems.
Texas Instruments
Texas Instruments: Angle Bisectors and Medians of Quadrilaterals
In this activity, students will construct angle bisectors and medians in quadrilaterals and explore the properties that appear to be true for four-sided figures. They may find it necessary to review the definitions and properties of...
Texas Instruments
Texas Instruments: Discovering Properties of Parallelograms, Kites & Trapazoids
This activity allows the teacher to cover the properties of a parallelogram, rectangle, rhombus, square, kite, and trapezoid in two days (90 min. block scheduling) Using a group setting students discover these properties using the Cabri...
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.
Khan Academy
Khan Academy: Identifying Quadrilaterals
Learn about the properties of rectangles, rhombuses, and squares, and practice identifying them. Includes hints for questions. CCSS.Math.Content.3.G.A.1 Understand that shapes in different categories
Texas Instruments
Texas Instruments: Properties of Parallelograms
In this activity, students go through the process of proving a quadrilateral to be a parallelogram. They understand the various characteristics of a parallelogram.
Khan Academy
Khan Academy: Properties of Shapes
Identify and compare shapes based on their attributes. Shapes include triangle types, quadrilateral types, pentagons, and hexagons. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...
McGraw Hill
Glencoe: Self Check Quizzes 2 Quadrilaterals
Use Glencoe's Math Course 2 randomly generated self-checking quiz to test your knowledge of quadrilaterals. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the "Check...
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.
Government of Alberta
Learn Alberta: Math Interactives: Exploring Shape Classification
Investigate the properties of triangles, quadrilaterals, and regular polygons using this interactive Learn Alberta math resource. Students are able to practice classifying shapes based on their different properties. Be sure to follow the...
CK-12 Foundation
Ck 12: Geometry: Quadrilaterals That Are Parallelograms
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to prove that a quadrilateral is a parallelogram given the properties of parallelograms.
Texas Instruments
Texas Instruments: Investigating Properties of Trapezoids
This activity uses the graphing calculator to investigate trapezoids. Numerous supplementary materials are included. [Requires Adobe Reader.]
Mangahigh
Mangahigh: Shape: Quadrilaterals Inscribed in Circles
Determine the missing angle measures of quadrilaterals inscribed in circles.
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: Special Midpoint Quadrilaterals
Midpoint Quadrilaterals are quadrilaterals that are formed when consecutive midpoints of a quadrilateral are connected. This activity will use Cabri Jr. to investigate what properties an exterior quadrilateral has if its midpoint...
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.
OER Commons
Oer Commons: Diagonals of a Rhombus
In this lesson, students learn how the diagonals of a rhombus are related. They use interactive sketches to learn about the properties of the angles and diagonals of squares, rectangles, rhombuses, parallelograms, and other...
Math Open Reference
Math Open Reference: Interior Angles of a Parallelogram
Learn about the interior angles of a parallelogram with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Cut the Knot
Cut the Knot: Geoboard
Students can use the interactive geoboard to create different types of quadrilaterals and investigate the properties of quadrilaterals. Requires Java. The geoboard can also be downloaded for offline use.