It's just not enough to know that something is true. Part of a MVP Geometry unit teaches young mathematicians how to write flow proofs and two-column proofs for conjectures involving lines, angles, and triangles.

Logical thinking is at the forefront of this jam-packed lesson, with young mathematicians not only investigating geometric concepts but also how they "know what they know". Through each activity and worksheet, learners wrestle with...

Starting with similar triangles and dilation factors, this unit quickly and thoroughly progresses into the world of right triangle features and trigonometric relationships. Presented in easy-to-attack modules with copious application...

Solids come in many shapes and sizes. Using geometry, scholars create two-dimensional cross-sections of various three-dimensional objects. They develop the lesson further by finding the volume of solids. The module then shifts...

Students evaluate art to enhance their core knowledge of fiction, American folk heroes, and the water cycle. In this art lesson, students complete a unit of activities to use art to study various topics of literature, history, and...

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

Resize and rotate different types of quadrilaterals--square, rectangle, rhombus, trapezoid, and kite--while learning the definitions of these different shapes and labeling the angles and diagonals. CCSS.Math.Content.3.G.A.1 Understand...

This site provides an online rectangular prism calculator. Using any three of the six attributes (length, width, height, surface area, volume or diagonal), students can calculate the other three attributes. The calculator allows students...

Find a definition of regular polygon, and learn how to calculate the internal angle, external angle, and number of diagonals of a regular polygon. Also, learn how to find the area of regular polygons.

The geometry tutorial investigates rectangles. Topics included are diagonals, area, and perimeter. The activity has several examples with detailed solutions.

Electron orbitals. Diagonal rule. Dot diagrams. The periodic table. There's so much to know about the tiniest building blocks of life- atoms. [4:41]

Given examples of quadrilaterals and their component parts, the student will use explorations and concrete models to prove a quadrilateral is a parallelogram, rectangle, square, or rhombus using opposite sides, opposite angles, or...

Mattie and her four sisters are visiting a toy store. Can you help them find different shapes in the toy store?

How would you translate 'Hogwarts' or 'Diagon Alley' or even 'Harry Potter'? Vox explains some of the very specific pitfalls of trying to translate J.K. Rowling's Harry Potter series. [5:54]

[Free Registration/Login may be required to access all resource tools.] Classifying quadrilaterals by side lengths, angle measures and diagonals.

[Free Registration/Login may be required to access all resource tools.] Identifying polygons, their diagonals and their angles

MathWorld provides the definition of a rectangle and the area formula of a rectangle.

[Free Registration/Login may be required to access all resource tools.] In this lesson students calculate the area and perimeter of a rhombus or kite. Students examine guided notes, review guided practice, watch instructional videos and...

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

Join Otto at the Phantasia construction site. Will you help him build a new playground?

Explore polygons with Wang, a ricksha puller. Answer his questions and he will give you a free ride!