Finding Sidelengths from Square Areas

This video tutorial introduces square numbers and their significance in mathematics. It explains how square numbers are derived by multiplying a number by itself and demonstrates this concept using multiplication tables. The tutorial also covers how to calculate the area of a square using square numbers and how to find the side length of a square when the area is given. Additionally, it emphasizes the importance of writing down proofs to demonstrate understanding and facilitate revision.

What is a square number?

• A number obtained by adding a number to itself

• A number that can be arranged in a square grid

• A number obtained by multiplying a number by itself

• A number in the shape of a square

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CCSS.8.EE.A.2

What is the square number of 4?

• 4

• 12

• 16

• 8

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CCSS.6.EE.A.1

Which of the following is not a square number?

• 36

• 49

• 52

• 64

What square number comes after 81?

• 100

• 91

• 82

• 90

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CCSS.8.EE.A.2

What is the square of 11?

• 11

• 121

• 110

• 111

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CCSS.8.EE.A.2

How do you find the area of a square with a side length of 5 meters?

• Divide 5 by itself

• Multiply 5 by itself

• Subtract 5 from itself

• Add 5 to itself

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CCSS.3.MD.C.7B

CCSS.4.MD.A.3

If the side length of a square is 8 meters, what is its area?

• 8 meters squared

• 32 meters squared

• 16 meters squared

• 64 meters squared

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CCSS.3.MD.C.7B

CCSS.4.MD.A.3

If a square has an area of 49 meters squared, what is the length of one side?

• 14 meters

• 42 meters

• 49 meters

• 7 meters

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CCSS.3.MD.C.7B

CCSS.4.MD.A.3

Why is it important to write down your mathematical proofs?

• All of the above

• To show your work to others

• To make it easier to check your work

• To remember the numbers better

What should you do if you're not great at multiplication tables?

• Avoid math problems

• Use a calculator always

• Guess the answers

• Practice more

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CCSS.3.OA.C.7