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
Mangahigh
Mangahigh: Shape: Quadrilaterals Inscribed in Circles
Determine the missing angle measures of quadrilaterals inscribed in circles.
CK-12 Foundation
Ck 12: Inscribed Quadrilaterals in Circles
[Free Registration/Login Required] Students will explore quadrilaterals inscribed in circles with this interactive activity. Click 'Challenge Me' to answer a practice question.
ClassFlow
Class Flow: What Are Quadrilaterals
[Free Registration/Login Required] This flipchart introduces quadrilaterals Utilizing a United streaming video. The flipchart allows students to identify quadrilaterals that are polygons, real world shapes and how other objects contain...
ClassFlow
Class Flow: Area of Polygons
[Free Registration/Login Required] This flipchart provides students with notes and practice with using formulas for finding the area of triangles and quadrilaterals.
SMART Technologies
Smart: Polygons
This SMART Notebook lesson allows students to characteristics of polygons by exploring vocabulary and sample problems.
AAA Math
Aaa Math: Finding the Fourth Angle of a Quadrilateral
An interactive site that instructs and demonstrates how to find the fourth angle of a quadrilateral. This site also has many links to other interactive lessons.
ClassFlow
Class Flow: Quadrilaterals
[Free Registration/Login Required] This flipchart introduces students to quadrilaterals and how to classify them.
Alabama Learning Exchange
Alex: Characteristics of Quadrilaterals
Learners will begin unit on quadrilaterals with basic overview of characteristics of parallelograms, rectangles, squares, rhombi, and isosceles and non-isosceles trapezoids. After the word wall is made, the teacher can use interactive...
BBC
Bbc: Bitesize: Maths: 2 D Shapes
Learn about the properties of 2-D shapes: circles, triangles, polygons, and quadrilaterals. Includes information, video, and examples about each, with games and quizzes for reinforcement.
Other
Ic Teachers: Shapes Quadrilaterals
Are you looking for a very basic website that will explain the basic properties of a quadrilateral? Use this site to learn about the properties of a square, rhombus, rectangle, parallelogram, trapezoid, and kite. There are also some...
Math Is Fun
Math Is Fun: Interior Angles of Polygons
Learn what an interior angle of a polygon is and how you can calculate their value in triangles, quadrilaterals, and pentagons. Includes a chart that overviews the "general rule" for determining the sum of internal angles in any polygon...
CK-12 Foundation
Ck 12: Geometry: Inscribed in Circles Study Guide
This study guide on circles covers some vocabulary terms, and inscribed angles and polygons. It is available for download with free registration.
Walter Fendt
Walter Fendt: Tangential Quadrilateral (Circumscribed Quadrilateral)
A short interactive activity which allows you to move the vertices of a quadrilateral circumscribed around a circle.
Walter Fendt
Walter Fendt: Cyclic Quadrilateral (Inscribed Quadrilateral)
A short interactive activity which allows you to move the vertices of a quadrilateral to prove that the sum of the opposite angles is 180 degrees.
Other
Generalization
Learn how to construct convex polygons and the mathematical foundations of symmetry on this site.
Alabama Learning Exchange
Alex: What Do We Have in Common?
This inquiry lesson explores the definitions of quadrilaterals and the properties of the diagonals of quadrilaterals to classify quadrilaterals. Learners will work cooperatively to justify conclusions. This lesson plan was created by...
Beacon Learning Center
Beacon Learning Center: Quad Squad
This interactive lesson investigates quadrilaterals and provides students with an opportunity to practice describing their attributes.
Geometry Help
Geometry Help: Quadrangles
Explains the basic concept of quadrangles (quadrilaterals} with step-by-step instructions and methods for solving specific problems on your own relating to this topic.
CK-12 Foundation
Ck 12: Elem Math: Given the Perimeter Find the Side Length and Area Squares
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to find the area of a square when given the perimeter. CCSS.Math.Content.3.MD.D.8 Solve real world and mathematical problems...
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...
Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: Areas Y Cuadrados
Reinforce your knowledge of the area of a quadrilateral by practicing with theses interactive activities.
CK-12 Foundation
Ck 12: Kites
[Free Registration/Login Required] Students will move the vertices of the kite to explore how to change the shape of quadrilaterals. Click learn more to watch a video and click challenge me to answer practice question.