TWKHTaya - chapter 3

Term	Lesson	Definition
Abscissa	3-7	The first number in the ordered pair is the x-coordinate or abscissa
Converse	3-5	If you reverse the parts of the Pythagorean Theorem, you have formed its converse.
Coordinate Plane	3-7	Recall that you can locate a point by using a coordinate system similar to the grid used by the mountain biker. It is called a coordinate plane.
Hypotenuse	3-5	The hypotenuse is the side opposite the right angle. It is the longest side of the triangle.
Irrational Number	3-4	Numbers that are not rational are called irrational numbers
Legs	3-5	the two shortest lines on a right triangle
Ordered Pair	3-7	Any point on the coordinate plane can be graphed by using an ordered pair of numbers.
Ordinate	3-7	Any point on the coordinate plane can be graphed by using an ordered pair of numbers
Origin	3-7	The origin is the point of intersection of the two number lines.
Perfect Square	3-1	Numbers such as 1, 4, 9, 16, and 25 are called perfect squares because they are squares of integers
Pythagorean Theorem	3-5	The Pythagorean Theorem describes the relationship between the lengths of the legs and the hypotenuse for any right triangle
Quadrants	3-7	Quadrants are four sections of the coordinate plane.
Radical Sign	3-1	The symbol √􏰀, called a radical sign
Real Number	3-4	The set of rational numbers and the set of irrational numbers together make up the set of real numbers
Square Root	3-1	A square root of a number is one of its two equal factors.
X-Axis	3-7	Goes side to side.
X-Coordinate	3-7	The first number in the ordered pair is the x-coordinate or abscissa
Y-Axis	3-7	Goes up and down.
Y-Coordinate	3-7	The second number is the y-coordinate or ordinate.