A collection of circular objects will be used to explore circumference and diameter of circles.

Pipe cleaners are used to create the perimeter of a rectangle in order to explore base and height.

[Free Registration/Login may be required to access all resource tools.] The video describes how to determine which shape is made of only straight lines. The video is followed by a series of practice questions to assess student...

This activity uses the graphing calculator to investigate trapezoids. Numerous supplementary materials are included. [Requires Adobe Reader.]

Play a game to build a hexagon.

Assess learning of polygons and perimeters with this interactive multiple choice practice and quiz activity. Click the question mark for hints.

This lesson plan has students solving word problems using scale drawings.

This lesson plan has students solve problems using scale drawings on a map.

Practice figuring out how the mean and median are affected when a data point is added to, taken from, or shifted within a data set. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...

Students practice interpreting scale models, receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

[Free Registration/Login may be required to access all resource tools.] Apply inscribed angle theorems.

Practice combining shapes to make other shapes. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on counting lines and curves in various two dimensional shapes.

[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to look at images and identify ellipses and different types of polygons. Includes video demonstrating a sample problem...

[Free Registration/Login may be required to access all resource tools.] For this learning module, students identify and count the number of a given shape within a set of 2D shapes. Includes video demonstrating a sample problem [1:16] and...

[Free Registration/Login may be required to access all resource tools.] This concept teaches students to solve for missing segments created by a tangent line and a secant line intersecting outside a circle.

[Free Registration/Login Required] Students are given an Isosceles triangle and are asked to move the point on the line segment to explore how the angle measure changes. Click learn more to watch a video demonstration and click challenge...

[Free Registration/Login Required] Students will move the vertices of the quadrilateral to form the congruent quadrilateral. Click learn more to watch a video and click challenge me to answer a practice question.

[Free Registration/Login Required] Students determine whether a hexagon can tessellate or not. Click challenge me to answer practice questions and click learn more to watch a video.

[Free Registration/Login Required] Students determine if squares can tessellate. Click challenge me to answer practice questions and click learn more to watch a video.

[Free Registration/Login Required] Students will explore tessellations and whether a polygon can tessellate. Click challenge me to answer practice questions and click learn more to watch a video.

[Free Registration/Login may be required to access all resource tools.] Find interior angle measures of polygons by drawing diagonals to create triangles.

[Free Registration/Login may be required to access all resource tools.] Students practice classifying various two dimensional shapes as rectangles, squares, circles or triangles.

[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on classifying rectangles, squares, circles and triangles.