1. Math 8 - Unit 1 Square Roots and the Pythagorean Theorem A square number or perfect square is any number that is a product that forms when we multiply a number by itself. There are different ways to show that a number is a perfect square Method 1 Dr aw a square whose area is equal to the square number Example: The number 9

2. Method 2 Find a number that multiplies by itself to produce that number Example: is 32 a perfect square? Example: is 49 a perfect square? Method 3: For large numbers, use the button on a calculator. If the answer is a whole number it is a perfect square. If the answer is a decimal value, then it isn't a perfect square.

3. Question: What is the area of a square with side length 11 cm? Answer: Question: What is the length of a square garden that has an area of 225 sq meters? Answer: Question: The sum of my digits is 13. What perfect square might I be? Possible Answers: Practice pg 8-10 #'s 4, 5, 10, 12, 14, 16