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1,419 reviewed resources for diagonal

Videos (Over 2 Million Educational Videos Available)
The Circulatory System Part 1: The Heart Video
8:55
The Circulatory System Part 1: The Heart
Cells - Overview & Introduction Video
4:07
Cells - Overview & Introduction
How Computers Work: What Makes a Computer, a Computer? Video
5:10
How Computers Work: What Makes a Computer,...
Other Resource Types ( 1,419 )
Lesson Planet

Diagonals to Quadrilaterals

For Teachers 9th - 12th Standards
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....
Lesson Planet

Diagonally Half of Me!

For Teachers 9th - 12th Standards
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...
Lesson Planet

Prove Rhombus Diagonals Bisect Angles

For Students 9th - 12th Standards
What do congruent triangles have to do with diagonals of a rhombus? Given a rhombus, pupils develop a proof showing that a diagonal bisects opposite angles. The learners use what they know about congruent triangles to create the...
Lesson Planet

Proving Parallelogram Diagonals Bisect

For Students 9th - 12th Standards
Diagonals of parallelograms are so nice  they share their lengths equally. Individuals investigate relationships that exist in the diagonals of parallelograms. They write a proof to show that the diagonals bisect each other.
Lesson Planet

Proving Congruent Diagonals

For Students 9th - 12th Standards
There's something special about the diagonals of rectangles. Young mathematicians prove a theorem about a given rectangle. Specifically, they must show that the diagonals are congruent.
4:38
Lesson Planet

Rhombus Diagonals

For Students 9th - 10th
Delving into a proof that the diagonals of a rhombus are perpendicular to each other, this lecture evaluates the angles and sides of this figure. It would serve as a great test preparation activity.
Lesson Planet

Diagonals

For Students 10th
In this diagonals activity, 10th graders identify and complete 11 different problems that include determining the diagonals of various figures shown. First, they draw the diagonals in the polygons shown and complete the table. Then,...
Lesson Planet

Diagonals of Quadrilaterals

For Teachers 9th - 12th Standards
Teach your mathematicians how to identify different polygons based on their diagonals. Relating quadrilaterals to the different number of diagonals formed, students use the TI to create a visual of their shape.
Lesson Planet

Interior Angles, Exterior Angles, and Diagonals of Polygons

For Students 8th - 11th Standards
How does the number of sides of a polygon affect the angle measures? Learners recognize a pattern in finding the total measure of interior and exterior angles and the number of diagonals. They use the patterns to calculate the number of...
Lesson Planet

Diagonals of a Rectangle

For Students 9th - 12th Standards
Coordinate the vertices of a rectangle. Pupils use the location of three vertices of a rectangle along the axis to find the coordinates of the fourth vertex. Using the vertices of the rectangle, scholars prove the diagonals are congruent...
Lesson Planet

Similarity: Instructional

For Students 7th - 8th
In this similarity worksheet, learners solve and complete 7 different problems that include determining various dimensions of mirrors shown. First, they find the length of the diagonal of the large mirror in the diagram. Then, students...
Lesson Planet

Quadrilaterals - Diagonals

For Teachers 2nd - 4th
Young geometers take a look at a variety of shapes and name each one. All of the shapes are quadrilaterals, and they all have intersecting diagonal lines running through them. This presentation would be good to use as an introduction to...
4:36
Lesson Planet

Area of Diagonal Generated Triangles of Rectangle are Equal

For Students 9th - 10th
Finding the area of each of the triangles that are created by drawing two diagonal lines through a rectangle is explored in this lecture. It provides a detailed explanation of how to use a formula to solve the given problem. Tip: Use...
4:36
Lesson Planet

Area of Diagonal Generated Triangles of Rectangle are Equal

For Students 9th - 10th
Finding the area of each of the triangles that are created by drawing two diagonal lines through a rectangle is explored in this lecture. It provides a detailed explanation of how to use a formula to solve the given problem. Tip: Use...
Lesson Planet

Going out of Business: Pythagorean Theorem

For Teachers 8th - 9th
Students find the length of diagonals.  In this Pythagorean theorem lesson, students use the Pythagorean theorem to determine the length of diagonals. 
Lesson Planet

Crazy 8s (Tennis)

For Teachers 5th - 10th
Practice those forehand and backhand tennis strokes. Here's an activity to practice hitting the ball diagonally across the court and also hitting the ball down the alley line. This figure eight drill can be challenging for young learners...
Lesson Planet

Midpoint of a Line Segment

For Students 10th
In this line segment activity, 10th graders identify and solve 10 different problems that include determining the midpoint of a line segment in each. First, they determine the midpoint of a segment that connects two points. Then,...
Lesson Planet

Investigating Properties of the Diagonals of Quadrilaterals

For Teachers 10th
Tenth graders investigate quadrilaterals.  In this geometry lesson, 10th graders investigate the properties of the diagonals of quadrilaterals.  The dynamic nature of Cabri provides opportunity for conjecture and verification.  The...
Lesson Planet

Diagonal #4

For Students 1st - 3rd
In this diagonal lines activity, students practice drawing diagonal lines in the middle of parallel diagonal lines. Students draw three diagonal lines.
Lesson Planet

Pythagorean Theorem Word Problems

For Students 10th
In this Pythagorean theorem worksheet, 10th graders solve 10 different word problems that include using the Pythagorean theorem in each. First, they determine the height of an equilateral triangle. Then, students determine the length of...
Lesson Planet

Digging into Diagonals

For Students 5th - 6th
In this math learning exercise, students discover the relationships between geometric figures and their diagonals. Students use cardboard triangles to form other geometric shapes and draw the diagonals on other geometric figures, keeping...
Lesson Planet

Quiz: Determinants - 3 x 3 Matrix (Diagonals Method)

For Students 7th - 9th
In this determinants learning exercise, students are given a matrix and expand it along the diagonal. This one-page learning exercise contains ten problems.
Lesson Planet

Why is This a Magic Square?

For Students 7th
In this magic square instructional activity, 7th graders identify and solve 12 different problems that include determining various magic squares. First, they determine the sum of numbers in each row, column, and diagonal. Then, students...
Lesson Planet

Elements Picture Assignment

For Teachers 9th - Higher Ed
Students identify the basic structural and decorative designs, create examples of line (horizontal/vertical/curved/diagonal), as well as identify and explain the difference between shape and form. Then, they identify and explain the use...

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