New ReviewTeach young mathematicians which shapes are classified as quadrilaterals and which aren't. A fun card game engages learners of all levels as they match shapes to the teacher's requests.

Let imaginations run wild as participants design animal pens. A performance task challenges young mathematicians to determine the perimeter or a missing side length of different animal pens. They then design pens that meet given...

All the 2-D and 3-D measurement work you need is in one location. Divided into three sections, the geometry lesson plans consist of visualization of three dimensions, classifying geometric figures, and finding surface area and volume....

Don't get tripped up by trapezoids. An enlightening video first shows how to derive the formula for the area of a trapezoid by partitioning the figure and rearranging it into a triangle. It then works through two examples of finding the...

Trapezium or trapezoid is a matter location! A British narrator explains the process of finding the area of a trapezium, otherwise known as a trapezoid. After watching several examples, learners practice the skill with the included...

They've all got four sides, but some have more interesting properties. Scholars learn the names of quadrilaterals. They also explore some properties of these quadrilaterals, including congruent angles, congruent and parallel sides, and...

With a little averaging, a trapezoid becomes a parallelogram. The section of an extensive geometry playlist shows how to derive the formula for the area of a trapezoid by changing it into a parallelogram. Using the formula, the video...

Classify quadrilaterals quickly. After playing a game to identify quadrilaterals, your young scholars should come away with knowledge of the properties of quadrilaterals. They then apply this knowledge to create a decision tree to ease...

Using the definition of a trapezoid, the segment within a large playlist on basic geometry explains other properties of trapezoids. The video introduces the special properties held by isosceles trapezoids.

Four sides hath rhombi, rectangles, squares, trapezoids, and parallelograms. Scholars learn different classifications of quadrilaterals by watching a short video from the Socratica Geometry series. They see how sides and angles help...

When are trapezoids better than rectangles? Using trapezoids pupils approximate the area of fabric defined by a function. Just like with rectangles, learners realize the more trapezoids the more accurate the approximation. Scholars use...

Make the right connections between the equations of perpendicular lines. Pupils find the equation of a line perpendicular to another line in the context of finding the equation of a side of a geometric figure. Learners write their...

Make connections between geometry and algebra concepts. Using a point on a side of a geometric figure and the equation of the line that contains the parallel opposite side, learners find the unknown equation of the line. They write the...

Transform trapezoids to a T. Pupils identify reflections and rotations that take trapezoids and map them back to themselves. They consider both isosceles and non-isosceles trapezoids.

Introduce the class to the quad in quadrilaterals. The presentation provides the names and definitions for the basic special quadrilaterals. A graphic shows the connections between the types of quadrilaterals introduced. The video points...

Prove the diagonals are shorter than the perimeter. Given an isosceles trapezoid, pupils develop a proof relating the length of the diagonals to the perimeter. Individuals sketch a graph of the trapezoid to assist with their explanations.

No two resources are alike, but trapezoids can be exactly the same. Individuals investigate a pair of congruent trapezoids on the coordinate plane. To prove that the trapezoids are congruent, they must use rigid motions to carry one to...

What's my shape? The short assessment provides the coordinates of the four vertices of a quadrilateral. Pupils use what they know about special quadrilaterals to determine whether the figure is a parallelogram, rhombus, rectangle,...

Sort this resource into the Use pile. Scholars investigate attributes of quadrilaterals and then use the results to sort and classify the shapes labeling each figure with their properties to justify the classifications.

If only you had a Sorting Hat to sort out quadrilaterals. Learners sort cutouts of quadrilaterals based on their properties and attributes. A flowchart helps them organize the results of the activity.

What type of quadrilateral is that? Discover the difference between the types of quadrilaterals. Small groups investigate types of quadrilaterals using geometry software to find their properties. To keep track of the different...

Apply geometric concepts to a design problem. Individuals examine the structural setup of the chain on a bicycle and use the measurements of the circles to determine the length of the chain. 

Put the tree back in geometry! Explore shapes and celebrate Christmas while using pentagon, square, and triangle pattern blocks to create a Christmas tree.

Strive to think outside of the quadrilateral parallelogram. Worksheet includes two problems applying prior knowledge of area and perimeter to parallelograms and trapezoids. The focus is on finding and utilizing the proper formula and...