Unit 2, Day 3

Unit 2, Day 3: Objective: Simplify radicals; distance formula can be introduced

Define: The formula, which is used to find the distance between two points (X1,Y1) and (X2,Y2) is called the distance formula.

1. Find the distance between the points. (1, 3) (2, 5)
2. What is the distance between the points A (4, 6) B (-2, -2)?
3. Define Distance formula

Answer Key:

1. Square root of (2 - 1)^2 + (5 - 3)62 = square root of 1^2 + 2^2 = square root of 1 + 4 equals square root of 5
2. use the distance formula so, AB = square root of (-2, -4)^2 + (-2, -6)^2 = 10 units
3. The formula, which is used to find the distance between two points (X1,Y1) and (X2,Y2) is called the distance formula.

Video: http://www.youtube.com/watch?v=nyZuite17Pc