Finding Missing Sides of Rectangles

The video tutorial explains how to solve problems involving rectangles on Khan Academy. It covers the use of area formulas for rectangles, specifically 'area equals length times width', to find missing side lengths. The tutorial provides step-by-step examples of solving for variables X and Y in different rectangle problems, emphasizing the use of opposite operations to isolate the variable.

What type of problems are introduced in this video?

• Problems involving rectangles with a missing side

• Problems involving triangles

• Problems involving circles

• Problems involving squares

What is the main task in the problem setup discussed?

• Finding the perimeter of a rectangle

• Calculating the volume of a cube

• Determining the missing side of a rectangle

• Identifying the type of polygon

Which formula is NOT used to calculate the area of a rectangle?

• Area = base x height

• Area = length x height

• Area = side x side

• Area = length x width

What is the formula used in the video to find the area of a rectangle?

• Area = base x height

• Area = length x width

• Area = length x height

• Area = side x side

In the first sample problem, what is the given area of the rectangle?

• 50 feet squared

• 80 feet squared

• 60 feet squared

• 70 feet squared

What is the width of the rectangle in the first sample problem?

• 4 feet

• 6 feet

• 5 feet

• 7 feet

What is the value of x in the first sample problem?

• 10 feet

• 11 feet

• 12 feet

• 13 feet

What operation is used to solve for x in the first sample problem?

• Division

• Multiplication

• Subtraction

• Addition

In the second sample problem, what is the given area of the rectangle?

• 26 feet squared

• 24 feet squared

• 22 feet squared

• 20 feet squared

What is the width of the rectangle in the second sample problem?

• 4 feet

• 1 foot

• 2 feet

• 3 feet