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chapter 1
Question | Answer |
---|---|
acute angle | greater than 0 degrees and less than 90 degrees |
adjacent angle | two angles in same plane with a common vertex and a common interior points |
angle | figure formed by two rays, or sides |
angle bisector | a ray that divides any angle into two congruent angles |
area | number of nonoverlappping square units of a given size that exactly cover the figure |
base | any side of a figure |
between | given three point A,B and C,B is between A and C if and only if all three of the points lie on the same linear and AB+BC= AC |
bisect | to divide into two congruent parts |
circumference | a circle is the distance around a circle |
collinear | points that lie on the same line |
complementary angles | two angles whose measure have a sum of 90 degrees |
congruent angles | angles that have the same measure |
congruent segments | segments that have the same lengths |
construction | a way of creating a figure that is more precise |
coordinate | a point corresponds to one and only number on the ruler |
coordinate plane | a plane that is divided into four regions by a horizontal line (x-axis) and a vertical line (y-axis) |
coplanar | points that lie in the same plane |
degree | a unit of angle measure; one degree is 1/360 of a circle |
diameter | segment that passes through the center of the circle and whore endpoints are on the circle |
distance | between any two points is the absolute value of the difference of the coordinates |
endpoint | a point at one end of a segment or the starting point of a ray |
exterior of an angle | set of all points outside the angle |
height | a segment from a vertex that forms a right angle with a line containing the base |
hypotenuse | the side across from the right angle that stretches from one leg to the other |
image | resulting figure |
interior of an angle | the set of all points between the side of the angle |
leg | one of the two congruent sides of the isosceles triangles |
length | the distance between the two endpoints of a segment |
line | a straight path that has no thickness and extends forever |
linear pair | pair of adjacent angles whose noncommon sides are opposite rays |
measure | angles are measured in degrees |
midpoint | the points that divides a segment into two congruent segment |
obtuse angle | measure greater than 90 degrees and less than 90 degrees |
opposite rays | two rays that have a common endpoints and form a line |
perimeter | sum of the side lengths of the figure |
pi | the ratio of the circumference of a circle to its diameter (3.14 or 22/7) |
plane | a flat surface that has no thickness and extends forever |
point | names a location and has no size |
postulate (axiom) | a statement that is accepted as true without proof POSTULATE ABOUT POINTS, LINES, AND PLANES HELP DESCRIBE GEOMETRIC PROPERTIES |
preimage | the original figure |
radius | a segment whose endpoints are the center of the circle and a point on the circle |
ray | part of line that starts at an endpoint and extents forever in one directon |
refection ( flip) | |
right angles | measure 90 degrees ` |
rotation(turn) | each point and its image are the same distance from p |
segment | part of a line consisting of two points and all point between them |
segment bisector | any ray segment or line that intersects a segment its midpoints |
straight angle | formed by two opposite rays and measure 180 degrees |
supplementary angles | two angles whose measures have a sum of 180 degrees |
transformation | a change in the position, size, or shape of a figure |
translation ( slide) | which all the points of a figure move the same distance in the same direction |
undefined term | basic figure |
vertex | common endpoints |
vertical angles | two nonadjacent angles formed by two insecting lines |