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.

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....

Where is the point? Given three points on the coordinate plane, the video walks through the steps to find the location of the fourth point to create a given special quadrilateral. The narrator first determines the coordinates of the...

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.

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...

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...

Sliding over a corner makes a rectangle. The resource demonstrates why the formula of the area of a parallelogram works. As part of a larger playlist on basic geometry, the video works examples dealing with parallelogram areas.

Properly organize parallelograms. Given special parallelograms, the narrator of a short video explains the properties of each. The section of a playlist on geometry uses the properties to classify the special parallelograms.

Coordinate the classification of quadrilaterals. Given the definitions of special quadrilaterals, a portion of a geometry playlist highlights ways to classify a quadrilateral. The video takes information from figures on a coordinate...

Properties spawn from parallel sides. With the aid of diagrams, the presentation shows the different properties of parallelograms. The segment of an extensive geometry playlist lists the properties that using the parallel sides of a...

If it has the properties of a parallelogram, it must be a parallelogram. A segment of a playlist on geometry presents the converses of the properties of a parallelogram. Given a quadrilateral with specific characteristics, the video...

Begin from the inside and work outward. Pupils construct quadrilaterals based upon the descriptions of the diagonals. Pairs then work through several configurations of diagonals and determine the types of quadrilaterals they can form....

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...

See how parallelograms can produce congruent triangles. Given a diagram of a parallelogram, scholars must show that two triangles are congruent. The triangles are made from the diagonals of the parallelogram.

Here are two tasks for a three-sided figure. Scholars complete some problems given a triangle. The first is to show that a quadrilateral drawn with midsegments of the triangle is a parallelogram. The second is to find the perimeter of...

Back to the original figure. Young mathematicians consider transformations that carry figures onto themselves. The figures in question are a parallelogram and a rhombus.

Cut straight to the proof. Given cutouts of different quadrilaterals, pupils draw diagonals. Learners cut up the figures along the diagonals to see whether they bisect each other. Scholars develop a geometric proof for the property they...

What conditions must be met for a quadrilateral to be a parallelogram? A slider interactive allows individuals to move the vertices of a quadrilateral. They answer questions that prove whether a given quadrilateral is a parallelogram.

Pupils use a parallelogram containing intersecting line segments to identify two similar triangles. They justify the similarity and use it to find a missing length.

Find two similar triangles in plane sight. Given a figure composed of a parallelogram and a triangle, pupils identify two similar triangles and provide an explanation. Class members use the similar triangles to find two missing side...

Let an informative resource on side congruence be on your side. Pupils prove that a given parallelogram has congruent sides with a two-column proof. They must apply triangle congruence, angle relationships, and properties of congruence...

Take the time to prove what seems obvious. The resource provides pupils a figure of a rectangle, which they use to develop a proof showing that the rectangle is also a parallelogram. Scholars must rely on the definition of a rectangle to...

Verify a figure by using coordinates. Pupils calculate the coordinates of the midpoints of the sides of a quadrilateral. They then use the coordinates to show the resulting figure is a parallelogram. 

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...