Geometry: Finding Missing Dimensions

The video tutorial teaches how to find missing side lengths in rectangles using perimeter and area formulas. It begins with an example of calculating the width when the perimeter is known, followed by solving for the length when the area is given. The tutorial emphasizes plugging known values into formulas and solving for the unknowns, encouraging practice for mastery.

What is the first step in finding a missing side length using perimeter?

• Measure the side directly

• Plug known values into the perimeter formula

• Use the area formula

• Guess the missing side length

If a rectangle's perimeter is 40 feet and one side is 12 feet, what is the next step to find the missing width?

• Multiply 12 by 2

• Divide 40 by 2

• Add 12 to 40

• Subtract 24 from 40

After subtracting the known side lengths from the total perimeter, what should you do next?

• Divide by 2

• Multiply by 2

• Add 16

• Subtract 8

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

• Area = length + width

• Area = length x width

• Area = length - width

• Area = 2 x (length + width)

If the area of a rectangle is 184 square meters and the width is 8 meters, how do you find the length?

• Add 8 to 184

• Multiply 184 by 8

• Subtract 8 from 184

• Divide 184 by 8

What is the length of a rectangle if its area is 184 square meters and its width is 8 meters?

• 23 meters

• 21 meters

• 20 meters

• 22 meters

What should you remember when solving for missing pieces in geometry problems?

• Use a calculator for all calculations

• Always guess the missing value

• Use the correct formula and plug in known values

• Ignore the given measurements