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# pre algebra vocab

### triangles,squares,pythagorean theorem

perfect square rational numbers whose square roots are whole numbers
square root one of the two factors of a number
radical sign the symbol used to indicate a non negative square root
real numbers the set of rational numbers together with the set of irrational numbers
irrational numbers a number that cannot be expressed as a over b where a and b are intergers and b does not equal zero
point a specific location in space with no size or shape
ray a part of a line that extends indefinitely in one direction
line a never ending straight path
angle two rays with a common end point
vertex the common end point of the rays froming an angle
sides two rays that make up an angle
degree the most common unit of measure for angles
protractor an instrument used to measure angles
acute angle an angle that measures less than 90 degrees
right angle an angle that measures 90 degrees
obtuse angle an angle with the measure greater than 90 degrees
straight angle an angle with a measure equal to 180 degrees
line segment part of a line containing two end points and all points between them
triangle a polygon having three sides
acute triangle a triangle that all angles are less than 90 degrees
obtuse triangle a triangle with one angle over 90 degrees
right triangle a triangle with one 90 degree angle
congruent line segments that have the same length, or angles that have the same measure
scalene triangle a triangle with no congruent sides
isosceles triangle a triangle that has at least two congruent sides
equilateral triangle a triangle with all sides congruent
legs the sides that are adjacent to the right angle of a right triangle
hypotenuse the side opposite the right angle in a right triangle
pythagoream theorem if a triangle is a right triangle, then the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the legs
Created by: brennaca