1. 9.1 Notes Geometric Mean

2. 9.1 Notes Arithmetic mean is another term that means the same thing as average. The second do now question could have been, “Find the arithmetic mean of 88 and 94.” The arithmetic mean of two numbers is found by adding the two numbers and dividing by two.

3. 9.1 Notes The geometric mean of two numbers is found by multiplying the two numbers and taking the square root of the product. The following formula will find the geometric mean of two numbers:

4. 9.1 Notes Place the two numbers that you are finding the geometric mean of in the places of a and b and solve the proportion.

5. 9.1 Notes Example: Find the geometric mean of 5 and 8.

6. 9.1 Notes Find the geometric mean of each pair of numbers. 1.16 and 4 2.8 and 16 3. 5 and 6