Chapter+3

Vocab: Abscissa:The first number in an ordered pair Converse:the opposite of the number, if you convert the Pythagorean theorem you get it's opposite Coordinate Plane:a 2 dimensional system for graphing ordered pairs Hypotenuse: is the side opposite of the right angle and the longest side Irrational Number: numbers that go on forever, pie is an example Legs: the two sides of a triangle connected to the right angle Ordered Pair: a pair of numbers that can be graphed on a coordinate plane Ordinate: the y axis coordinate Origin:the cross section on the coordinate plane Perfect Square: A square root that comes out to a whole number Pythagorean Theorem: a^2 + b^2 = c^2 Quadrants:the four sections of the coordinate plane Radical Sign:the sqaure root symbol Real Number: integers, whole numbers, rational numbers, irrational numbers square root: a number times itself equals another number, square root of 144 is 12 X-Axis: the axis running horizontal on the coordinate plane X-Coordinate: a coordinate on the x axis Y-Axis: the axis running vertical on the coordinate plane Y-Coordinate: a coordinate on the y axis Notes: 3-1 square root radical sign: the symbol for square root perfect square: when the square root works out to be a whole number square root of 64= 8 a fraction square root is you find the square root of both fractions then write the answers as a fraction if there is a sign with a ± then you find the square it put the sign in the answer squaring a square rooting are two different things!, when you square with t sign, you just find the square root m^2=81 just square root them both y^2=4/25 square root the variable, then square root the denominator and the numerator and put them in a fraction

Notes: 3-2 square roots: √1=1 √4=2 √9=3 √16=4 √25=5 √36=6 √49=7 √64=8 √81=9 √100=10 √121=11 √144=12 √169=13 Steps: 1. take square rot find where it fits on the square root column 2. find the middle number of the two square roots 3. find out how close our number is to the middle



Whole numbers: numbers 0 and up, whole numbers are integers Integers: positive and negative numbers, integers are not whole numbers, not including fractions or decimals Rational numbers: positive and negative #/fractions that repeat or end Irrational numbers: numbers that go on forever, pie is an example Real number: all things listed above

-√3

Vocab: coordinate plane : origin: y-axis: x-axis: quadrants: ordered pair: x and y numbers x-coordinate: first number abscissa y-coordinate: the y coordinate ordinate