Perimeter and Area Concepts

The video tutorial explains how to calculate the perimeter of various shapes, including rectangles, circles, and squares. It covers the concept of perimeter as the sum of the lengths around a shape and provides examples of calculating perimeter without formulas. The tutorial also discusses the circumference of circles, the cost of fencing using perimeter, finding missing sides, and combining like terms in algebraic expressions. The video concludes with calculating the perimeter of a square using its area.

What is the basic method to find the perimeter of any shape?

• Subtract the lengths of opposite sides

• Divide the total length by the number of sides

• Add the lengths around the outside

• Multiply all side lengths

If a rectangle has sides of 12 and 7, what is its perimeter?

• 38

• 24

• 19

• 42

Why might you think of perimeter as the amount of fencing needed?

• Because it measures the area

• Because it measures the boundary length

• Because it measures the volume

• Because it measures the space inside

For which shape is it necessary to use a formula to find the perimeter?

• Rectangle

• Triangle

• Circle

• Square

What is the formula for the circumference of a circle when given the radius?

• π × diameter

• 2 × π × radius

• π × radius

• 2 × radius

If the diameter of a circle is 2, what is its circumference?

• 6.28

• 4π

• π

• 2π

How much will it cost to fence a yard with a perimeter of 60 feet if the cost is $2.60 per foot?

• $180

• $120

• $200

• $156

What is the first step in finding a missing side when calculating perimeter?

• Look at other sides in the same direction

• Guess the length

• Measure the diagonal

• Use a formula

If a cat walks around a space with a perimeter of 66 feet, how far did it walk?

• 132 feet

• 99 feet

• 66 feet

• 33 feet

What is the process of adding all x's together in an algebraic expression called?

• Simplifying

• Combining like terms

• Factoring

• Distributing