Calculating Perimeter of Shapes

Professor Dave explains the concept of perimeters, which is the distance around a shape. He discusses how to calculate perimeters for various polygons, including rectangles, squares, and triangles, using simple addition and algebraic methods. The video also covers solving perimeter problems with algebra and introduces the concept of curvature, noting that calculus is needed for non-circular curves. The tutorial concludes with a call to action for viewers to subscribe and support the channel.

What does the term 'perimeter' refer to in geometry?

• The area of a shape

• The distance around a shape

• The volume of a shape

• The diagonal of a shape

Why was understanding perimeter important for early farmers?

• To calculate the area of their land

• To determine the amount of material needed to enclose their land

• To measure the height of their crops

• To find the volume of their storage

How do you calculate the perimeter of a rectangle?

• Add the length and width

• Multiply the length by the width

• Add all side lengths together

• Multiply the length by four

What is the formula for the perimeter of a square?

• Side length plus two

• Side length times two

• Side length times four

• Side length plus four

What is the perimeter of a rectangle with dimensions 4 by 2?

• 10

• 12

• 14

• 8

If a square has a side length of 5, what is its perimeter?

• 15

• 20

• 25

• 30

If a rectangle's perimeter is 24 and its length is three times its width, what is the width?

• 2

• 5

• 4

• 3

In a rectangle with a perimeter of 24, if the length is three times the width, what is the length?

• 9

• 8

• 7

• 6

How can you find the missing side of a right triangle?

• Using the area formula

• Using the Pythagorean theorem

• By adding all sides

• By measuring the angles

What is the perimeter of a right triangle with legs of 3 and 4?

• 11

• 10

• 13

• 12