math chapter 1
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Created by:
ched14 Plus on September 10, 2012
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Description:
1-3 to 1-9
Chapter ended september 24th 2012
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36 terms
English | Math / Symbols |
|---|---|
 conjecture | reasoning that involves the formation of conclusions from incomplete evidence |
| counterexample | an example that shows a conjecture is false or incorrect |
| point | location |
| space | made up of all points |
| line | a seris of points |
| plane | a flat surface without thickness |
| coplaner | points and line on the same plane |
| postulate | accept state ment |
| segment | part of a line |
| ray | a line with and end point and keeps going on the other side |
| opposite rays | two collinear rays with the same end point |
| parrel line | coplainer lines that never intersect |
| skew lines | lines that are not parrel and DON"T intersect |
| congruent segments | two segments with same leangth |
| midpoint | divids the line segment in half |
| acute angle | 0<x<90 |
| right angle | x=90 |
| obtuse angle | 90<x<180 |
| straight angle | x= 180 |
| congruent angles | angles with the same measure |
| vertical angles | two angles that are oppisite rays |
| complementry angles | Two angles that add up to 90 degrees |
| adjacent angles | two angles that share a common vertex and side, but have no common interior points |
| supplementary angle | When the sum of the measures of a pair of angles add up to 180° |
| perpidicular lines | lines that intersect to form a right angle |
| angle bisector | a ray that divids a coplaier into 2 equal angles |
| perimeter | the size of something as given by the distance around it P= L+L+W+W or P= 2L+ 2W |
| area | the extent of a 2-dimensional surface enclosed within a boundary A= L*W² |
| circumfrance | The distance around a circle 2πR or pie D |
| area of circle | pie R*R , A=πr² |
| inches to feet | 12 in = 1 foot |
| inches to yards | 36in = 1 yard |
| feet to yards | 3ft = 1 yard |
| feet to a mile | 5,280 = 1 mile |
| millimeters to centimeters | 10mm = 1 cm |
| centimeters to meters | 100cm =1 m |
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