chapter 1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| acute angle | greater than 0 degrees and less than 90 degrees
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| adjacent angle | two angles in same plane with a common vertex and a common interior points
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| angle | figure formed by two rays, or sides
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| angle bisector | a ray that divides any angle into two congruent angles
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| area | number of nonoverlappping square units of a given size that exactly cover the figure
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| base | any side of a figure
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| 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
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| bisect | to divide into two congruent parts
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| circumference | a circle is the distance around a circle
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| collinear | points that lie on the same line
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| complementary angles | two angles whose measure have a sum of 90 degrees
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| congruent angles | angles that have the same measure
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| congruent segments | segments that have the same lengths
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| construction | a way of creating a figure that is more precise
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| coordinate | a point corresponds to one and only number on the ruler
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| coordinate plane | a plane that is divided into four regions by a horizontal line (x-axis) and a vertical line (y-axis)
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| coplanar | points that lie in the same plane
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| degree | a unit of angle measure; one degree is 1/360 of a circle
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| diameter | segment that passes through the center of the circle and whore endpoints are on the circle
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| distance | between any two points is the absolute value of the difference of the coordinates
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| endpoint | a point at one end of a segment or the starting point of a ray
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| exterior of an angle | set of all points outside the angle
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| height | a segment from a vertex that forms a right angle with a line containing the base
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| hypotenuse | the side across from the right angle that stretches from one leg to the other
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| image | resulting figure
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| interior of an angle | the set of all points between the side of the angle
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| leg | one of the two congruent sides of the isosceles triangles
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| length | the distance between the two endpoints of a segment
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| line | a straight path that has no thickness and extends forever
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| linear pair | pair of adjacent angles whose noncommon sides are opposite rays
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| measure | angles are measured in degrees
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| midpoint | the points that divides a segment into two congruent segment
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| obtuse angle | measure greater than 90 degrees and less than 90 degrees
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| opposite rays | two rays that have a common endpoints and form a line
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| perimeter | sum of the side lengths of the figure
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| pi | the ratio of the circumference of a circle to its diameter (3.14 or 22/7)
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| plane | a flat surface that has no thickness and extends forever
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| point | names a location and has no size
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| postulate (axiom) | a statement that is accepted as true without proof
POSTULATE ABOUT POINTS, LINES, AND PLANES HELP DESCRIBE GEOMETRIC PROPERTIES
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| preimage | the original figure
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| radius | a segment whose endpoints are the center of the circle and a point on the circle
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| ray | part of line that starts at an endpoint and extents forever in one directon
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| refection ( flip) |
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| right angles | measure 90 degrees
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| rotation(turn) | each point and its image are the same distance from p
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| segment | part of a line consisting of two points and all point between them
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| segment bisector | any ray segment or line that intersects a segment its midpoints
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| straight angle | formed by two opposite rays and measure 180 degrees
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| supplementary angles | two angles whose measures have a sum of 180 degrees
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| transformation | a change in the position, size, or shape of a figure
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| translation ( slide) | which all the points of a figure move the same distance in the same direction
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| undefined term | basic figure
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| vertex | common endpoints
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| vertical angles | two nonadjacent angles formed by two insecting lines
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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