Khan Academy
Khan Academy: Area of Trapezoids
Video tutorial demonstrates how to find the area of a trapezoid using the formula A=(a+b)/2 x h. [4:47]
Khan Academy
Khan Academy: Area of Triangles Intuition
Learn the formula for the area of a triangle, one half base times height. [5:29]
Khan Academy
Khan Academy: Finding Area With Fractional Sides 1
Models how to multiply fractional side lengths given in metric units to find the area of rectangles. [3:46]
Khan Academy
Khan Academy: Triangles: Finding Area Using Similarity and Congruence
Explains how to determine the area of a pentagonal shaded region in a triangle. The triangle that is broken into multiple similar and congruent triangles.
Khan Academy
Khan Academy: Worked Examples: Geometry: Geometry: Triangles and Parallelograms
Students explore the properties of triangles and parallelograms in this video tutorial.
Sophia Learning
Sophia: Calculating the Area of a Rectangle
In this video tutorial, the instructor demonstrates how to determine how to calculate the area of a rectangle and assess knowledge with a quiz. [3:01]
Sophia Learning
Sophia: Area of a Parallelogram With Triangles and Rectangles
In this video tutorial lesson, determine the area of a parallelogram using triangles and rectangles then assess learning with a quiz. [3:34]
Sophia Learning
Sophia: Area of a Parallelogram With Triangles and Rectangles
Explore how to find the area of a parallelogram using triangles and rectangles, then assess learning with a quiz.
Sophia Learning
Sophia: Area of a Trapezoid
This video lesson demonstrates how to solve for the area of a trapezoid. The tutorial includes detailed examples. Students can check their understanding with an assessment.
Sophia Learning
Sophia: Special Right Triangles
Special right triangles are explored in this video tutorial. The lesson provides four videos that explain the side ratios for 45-45-90 and 30-60-90 triangles along with real-world examples involving each type of triangle.
Mucho Math
Algebra2go: Finding Perimeter of Rectangular Shapes
This video requires students to find missing side lengths of rectangular shapes prior to finding the perimeter.
Khan Academy
Khan Academy: Quadrilaterals: Area of a Parallelogram
Showing that the area of a parallelogram is base times height.
Khan Academy
Khan Academy: Area of Trapezoids
Area of a trapezoid is found with the formula, A=(a+b)/2 x h. Learn how to use the formula to find area of trapezoids.