Learn how to find the *area of a circle* with simple, step-by-step examples! In this middle school math lesson, Mrs. C from Math Defined explains how to use the formula *A = πr²* to calculate the area of a circle whether you’re given the...

During this shorts math video I will be using the area model to factor a quadratic expression. We will use a rectangle as a graphic organizer to support our success factoring a quadratic expression. We will draw a rectangle and divide...

Pupil outcome: I can use understanding of area and counting strategies to solve problems involving area. Key learning points: - The units of counting area must be the same if you want to compare the areas of different shapes. - The units...

Pupil outcome: I know that shapes with the same area can have different perimeters and vice-versa. Key learning points: - Area and perimeter are calculated from the side lengths of 2D shapes. - Area is measured in square units. -...

Pupil outcome: I can create different shapes with the same area. Key learning points: - If you have the same number of squares, the area will be the same however they are arranged. - There must be no gaps or overlaps between the shapes...

Pupil outcome: I can use my knowledge of linear graphs to solve problems. Key learning points: - Knowledge of the geometric properties of shapes can be used here. - Knowledge of ratio can be used here.

Pupil outcome: I can use squares to cover the surface and count the area. Key learning points: - Using squares means that there are no gaps or overlaps. - Fractions of squares can be added to make whole squares.

Pupil outcome: I can find the area of triangles, quadrilaterals and composite rectilinear shapes. Key learning points: - The formula can be used to find the area of a triangle. - There can be more than one way to find the area of a...

Pupil outcome: I can calculate the area of rectangles, triangles, parallelograms and trapeziums efficiently. Key learning points: - The formula for the area of a rectangle is bh - The formula for the area of a parallelogram is bh - The...

You can use a formula (equation) or a proportion to find sector area. This video shows to to do both strategies. The final example has you "work backwards" where you are given the sector area and you have to solve for the radius.

In this video, we investigate how changing the linear dimensions of a 3d solid will affect the volume and surface area. After a dilation of a certain scale factor, how can that scale factor be used to predict the new volume or surface...

Find the Area of a Right Triangle Using a T-Chart finds the area of a right triangle by using a T chart to describe both the mathematical operations and the written explanations.

Area: Isosceles Triangle finds the area of an isosceles triangle by using a T chart to describe both the mathematical operations and the written explanations.

Area: Equilateral Triangle finds the area of an equilateral triangle by using a T chart to describe both the mathematical operations and the written explanations.

“Same Area, Different Perimeter” explains how rectangles that have the same area can have different perimeters.

In this video, the teacher explains the concept of a recursive process by exploring patterns in linear and nonlinear relationships. They use examples of rectangles and l-shaped figures to demonstrate how the pattern can be extended and...

In this video, the teacher explains how to determine whether to find area, surface area, or volume in different situations by considering the units needed. The video provides examples and explanations for each measurement type, making it...

In this video, students learn how to find the dimensions of a figure formed when removing a smaller square from a larger square. The teacher explains the concept of polynomial identities and demonstrates how to use them to find the...

In this video, students learn how to measure the area of shapes using grid paper. The video emphasizes the importance of focusing on the area of the shape on the grid paper, rather than the entire grid paper itself.

In this video, we learn how to find the area and perimeter of a rectangle when the length of every side is not known. The teacher explains the formulas for calculating perimeter and area, and demonstrates how to use these formulas to...

In this lesson you will learn how to determine if a triangle is a right triangle by applying the Area of Squares Proof.

In this lesson, students will learn how to represent products as areas using a multiplication table. They will understand that the product of two factors can be found by matching the row and column of the multiplication table.

In this video lesson, students will learn how to describe the combined area of two squares using consecutive integers. They will explore polynomial identities and how to write expressions to represent the relationship between consecutive...

This video lesson teaches students how to find the area of a polygon by multiplying the length and width. It explains the concept of area and reviews the use of arrays for multiplication. The video also emphasizes the importance of not...