Hi, what do you want to do?
Curated Video
Identifying Line Symmetry in Irregular Polygons
In this video, the teacher explains how to identify line symmetry in irregular polygons. They discuss the three options for line symmetry - horizontal, vertical, and diagonal - and emphasize the importance of having matching parts when...
Curated Video
Identifying Line Symmetry in Regular Polygons
In this video, the teacher explains how to determine the number of lines of symmetry in regular polygons. They discuss the three options for line symmetry: horizontal, vertical, and diagonal. Using examples of an equilateral triangle,...
Curated Video
Diagonal lines of symmetry
Pupil outcome: I can reflect shaded squares and polygons in a diagonal line of symmetry. Key learning points: - A line of symmetry does not have to be vertical or horizontal. You can reflect shapes in a diagonal line of symmetry. - You...
Brian McLogan
How to find the missing angle of a kite
👉 Learn how to solve problems with kites. A kite is a four-sided shape (quadrilateral) with two equal pairs of adjacent sides and the diagonals are perpendicular. Some of the properties of kites are: each pair of adjacent sides are...
Let's Tute
Trapezium and Kites - Properties
A plane figure with four sides and four angles is called a Quadrilateral. Let's learn its different types: Parallelogram, Trapezium & Kite in this session
Khan Academy
Rhombus Diagonals, Quadrilaterals, Geometry
Delving into 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.
Curated OER
How Do You Find the Sum of the Interior Angles of a Polygon?
Squares, pentagons, triangles, polygons. How is it possible to figure out the sum of the interior angles of any of these multi-faceted shapes? There's got to be a formula. Of course there's a formula. That's what algebra is all about,...
Flipped Math
Unit 5 Review: Quadrilaterals and Polygons
Yes, it will be on the test. Young mathematicians first view an educational video to refresh their memories about material from the unit. They then complete a review worksheet where they find the measures of interior angles of polygons,...
CK-12 Foundation
Area and Perimeter of Trapezoids: Lesson
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...
Flipped Math
Conditions for Rectangles, Rhombuses and Squares
Here's a special lesson about some special parallelograms. The fifth of seven parts in the Geometry - Quadrilaterals and Polygons unit focuses on the conditions for rectangles, rhombuses, and squares. Young mathematicians use these...
Sophia Learning
Sophia: Diagonals in Regular Polygons
In this video tutorial, the instructor demonstrates how to determine the number of diagonals in a regular polygon by looking at the number of vertices, and the number of diagonals. Use the formula to complete the assessment to check...
Sophia Learning
Sophia: Diagonals in Regular Polygons
In this video tutorial, the instructor uses data to derive the formula to solve for number of diagonals in a regular polygon. Assess understanding with a quiz. [5:43]
Sophia Learning
Sophia: Regular Polygon Diagonals Practice
The instructor of this video lesson demonstrates how to find the number of diagonals in a regular polygon using a formula. [3:01]
Imagine Learning Classroom
Learn Zillion: Lesson Video for 'Create a Right Triangle on a Coordinate Plane'
In this lesson, you will learn how to create a right triangle on a coordinate plane by using two points that form a diagonal line segment. [4:39]