# Pre Algebra Chapter 3 Vocab

### 19 terms by rileyberger6

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### abscissa

x-coordinate; 1st coordinate in an ordered pair

### converse

the reverse parts of the Pythagorean Theorem

### coordinate plane

a plane in which a horizontal number line and a verical number line intersect

### hypotenuse

the side opposite the right angle in a right triangle

### irrational number

a number that cannot be expressed as a fraction

### legs

the two sides of a right triangle that form the right trangle

### ordered pair

A pair of numbers that can be used to locate a point on a coordinate plane

### ordinate

the second number of an ordered pair

### origin

the intersection of the y-axis and the x-axis on a coordinate plane

### perfect square

a number that is the square of an integer

### Pythagorean Theorem

in any right triangle, the sum of the squares of the lengths of the legs is equal to the square of the length of the hypotenuse

four regions into which a coordinate plane is divided by the x-axis and the y-axis

the symbol used to indicate a non-negative square root

### real number

any rational or irrational number

### square root

a number which when multiplied by itself gives the original number

### x-axis

the horizontal number line that helps to form the coordinate plane

### x-coordinate

the first number of an ordered pair

### y-axis

the vertical number line that helps to form the coordinate plane

### y-coordinate

the second number of an ordered pair

Example: