**TI83F* AppVariable file 04/07/08, 20:29N = MC303= ; nav 7850319B3DD7B512E2ED23DA87DFF14DMC303. MC3031  coordinate plane!coordinate plane:A plane, also called a coordinate grid or coordinate system, in which a horizontal number line and a vertical number line intersect at their zero points.  hypotenuse !Bhypotenuse:The side opposite the right angle in a right triangle. irrational numbersoirrational numbers:Numbers that cannot be expressed as fractions, terminating decimals, or repeating decimals. legsT!>legs:The sides of a right triangle that form the right angle. perfect squarepperfect square:A number whose square root is a rational number.Example:25 is a perfect square since 25 = 5^2. Pythagorean TheoremPythagorean Theorem:If a and b are the measures of the legs of a right triangle and c is the measure of the hypotenuse, then c^2 = a^2 + b^2.  radical sign4radical sign:The symbol , used to indicate a root.  real numbersJreal numbers:The set of rational numbers and irrational numbers together.   square rootsquare root:One of the two equal factors of a number. If a^2 = b, then a is the square root of b.Example: 12 is a square root of 144 since 12^2 = 144.   Venn DiagramaVenn Diagram:A diagram that uses circles to show relationships among sets of numbers or objects.8`@@ @"@E5d edT STTQc3S#@@BLB@@ @     @L@8` @H2"KQ)0"8Q$@JLb*@JTp@JT1R@@ @@ (@@(@ bۿD@@  @@$@%'T@%)T@'T@@@@@ @  @ @ @(2 @Q( @!Q$@!(*`baBhBE`dQ@@@ L!Ҕ@@ @@@T@"T0" IT@JLb JT@JTP JT@JTP1JT@1R @8`@@ @"@E5d edT STTQc3S#@@BLB@@ @     @L@a