en CR Basic Definitions 28 Acute Angle : 0 < angle < 90 Obtuse Angle : 90 < angle < 180 Irrational Number : A radical that can not be simplified into a whole number Equation : Has an equal sign Expression : One term or one factor; no equal sign Associative Property : (a+b)+c = a+(b+c) Commutative Property : 6*7 = 7 *6; only holds for addition and multiplication Distributive Property : 2 (3 + x) = 2*3 + 2*x Reflexive Property : AB = AB Complementary Angles : Exactly two angles that sum to 90 degrees Supplementary Angles : Exactly two angles that sum to 180 degrees Intersection : a point where two lines cross Real Numbers : All numbers that are not complex Rational Numbers : Can be written as a fraction with integer numerator and denominator Whole Number : the natural numbers and 0 Natural Number : 1, 2, 3, 4, 5..... Integers : All whole numbers and their opposites (includes negatives) Operation : Add, Subtract, Multiply, and Divide Inverse Operation : Addition & Subtraction; Multiplication & Division; one "undoes" the other Inequality : Relates different expressions in increasing or decreasing order Hypothesis : In an if-then statement, it comes after the "if" Conclusion : In an if-then statement, it comes after the "then" Hypotenuse : Only in right triangles; opposite the right angle Multiplicative Identity : one Additive Identity : zero Ordered Pair : (x,y) Origin : O (0,0) Parallel Lines : Two lines with the same slope that never intersect & are always the same distance apart Perpendicular Lines : Two lines that intersect and 90 degree angles Perimeter : Measures the length of the fence in a field Surface Area : Measures the acreage in a field Volume : Measures the amount of water in a water tower Radius : In a circle, the distance from the center to the edge Radical : ex: Square root Symbol Congruent : Two figures that are exactly the same in sides and angles Square root : the _____________ of 49 is 7 Straight angle : An angle that measures 180 degrees Variable : a symbol that represents a number Vertex : In a polygon, each angle is called a ________ Regular polygon : A shape with all sides and all angles are equal Quadrant : the cartesian plane has 4 Pythagorean Theorem : the sum of the square of the legs of a right triangle is equal to the square of the hypotenuse Polygon : a flat shape with at least three sides Polyhedron : a 3 dimensional figure; ex- cube, prism, pyramid, cylinder, cone, etc Prime Number : A number whose only factors are 1 and itself Terms : when things are being added or subtracted we call them ________ Factors: when things are being multiplied (or divided) _______ Midpoint : (sum of x's/ 2 , sum of y's/2) Transversal : a line that intersects parallel lines

Basic Definitions

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Across:

3.	Measures the amount of water in a water tower
5.	2 (3 + x) = 23 + 2x
6.	a line that intersects parallel lines
9.	In a circle, the distance from the center to the edge
14.	(sum of x's/ 2 , sum of y's/2)
16.	O (0,0)
21.	0 < angle < 90

23.	ex: Square root Symbol
24.	Addition & Subtraction; Multiplication & Division; one "undoes" the other
25.	Add, Subtract, Multiply, and Divide
26.	Measures the length of the fence in a field
27.	when things are being added or subtracted we call them ________
28.	An angle that measures 180 degrees

Down:

1.	a 3 dimensional figure; ex- cube, prism, pyramid, cylinder, cone, etc
2.	In a polygon, each angle is called a ________
4.	AB = AB
7.	Measures the acreage in a field
8.	one
10.	Exactly two angles that sum to 180 degrees
11.	(a+b)+c = a+(b+c)
12.	a flat shape with at least three sides

13.	Two figures that are exactly the same in sides and angles
15.	All numbers that are not complex
17.	a point where two lines cross
18.	Can be written as a fraction with integer numerator and denominator
19.	90 < angle < 180
20.	A radical that can not be simplified into a whole number
22.	when things are being multiplied (or divided) _______

Basic Definitions

Across:

3.	Measures the amount of water in a water tower
5.	2 (3 + x) = 23 + 2x
6.	a line that intersects parallel lines
9.	In a circle, the distance from the center to the edge
14.	(sum of x's/ 2 , sum of y's/2)
16.	O (0,0)
21.	0 < angle < 90

23.	ex: Square root Symbol
24.	Addition & Subtraction; Multiplication & Division; one "undoes" the other
25.	Add, Subtract, Multiply, and Divide
26.	Measures the length of the fence in a field
27.	when things are being added or subtracted we call them ________
28.	An angle that measures 180 degrees

Down:

1.	a 3 dimensional figure; ex- cube, prism, pyramid, cylinder, cone, etc
2.	In a polygon, each angle is called a ________
4.	AB = AB
7.	Measures the acreage in a field
8.	one
10.	Exactly two angles that sum to 180 degrees
11.	(a+b)+c = a+(b+c)
12.	a flat shape with at least three sides

13.	Two figures that are exactly the same in sides and angles
15.	All numbers that are not complex
17.	a point where two lines cross
18.	Can be written as a fraction with integer numerator and denominator
19.	90 < angle < 180
20.	A radical that can not be simplified into a whole number
22.	when things are being multiplied (or divided) _______