[Free Registration/Login Required] Students will move the interactice quadrilateral to determine which quads are parallelograms. Click learn more to watch a video and click challenge me to answer a practice question.

[Free Registration/Login may be required to access all resource tools.] This study guide looks at the definitions and units for perimeter, area, and circumference, and at the perimeter and area of different shapes, including regular...

This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a parallelogram in a coordinate plane. It is 4 of 6 in the series titled "Coordinate...

A "three star geometry problem" requiring knowledge of how to complete geometric proofs and some prior math knowledge. This problem asks to prove that the mid points of any quadrilateral form a parallelogram.

A "three star geometry problem" requiring knowledge of how to complete geometric proofs properties of parallelogram.

Geometry concepts are briefly discussed at this site, including volume of a cylinder, parallelograms, circles, trapezoids, and triangles. Sample problems and applications are included for practice.

This lesson focuses on quadrilaterals which can fall into multiple categories based on the number of sides and the angles.

A comprehensive tutorial from AAA Math that contains explanations, interactive practices and challenging games.

Students solve for the area of rectangles, squares, triangles, trapezoids, and parallelograms.

Calculate certain variables of a parallelogram depending on the inputs provided. Calculations include side lengths, corner angles, diagonals, height, perimeter, and area of parallelograms.

This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a parallelogram in a coordinate plane. It is 1 of 6 in the series titled "Coordinate...

Young scholars 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...

The Chinese character mark for Tan II (pronounced she-tow-bah) is the second of two lessons to introduce first grade students to geometry using tangrams. This lesson plan incorporates history, math, and language arts. In this lesson plan...

[Free Registration/Login Required] In this flipchart, students will investigate the area and perimeter of rectangles and parallelograms. This is an interactive lesson and also includes an assessment.

In this activity, students create geometric figures, and use analytic and coordinate geometry to investigate their attributes. They go through the process of proving that a quadrilateral is a parallelogram.

[Free Registration/Login may be required to access all resource tools.] Cursor down if needed to locate the video "Visually Identifying Quadrilaterals (Trapezoids, Parallelograms, Rectangles, Squares, Rhombi)." Students watch a video and...

Here is a partial list of theorems, postulates, and properties.

[Free Registration/Login Required] Students will use the classify different shapes by changing the points on the given shape. Click learn more to watch a video and click challenge me to answer a practice question.

[Free Registration/Login Required] Students will use the interactive activity to complete the venn diagram. Click learn more to watch a video and click challenge me to answer a practice question.

[Free Registration/Login may be required to access all resource tools.] This study guide reviews the formulas for area and perimeter of triangles and different kinds of quadrilaterals.

Explore quadrilateral properties and threorems.

[Free Registration/Login may be required to access all resource tools.] Find the degree measure of unknown angles in given quadrilaterals.

[Free Registration/Login may be required to access all resource tools.] Classify different types of quadrilaterals by their angles and side lengths.

Explains the basic concept of a rhombus with step-by-step instructions and methods for solving specific problems on your own relating to this topic.