Unit:2 Vocabulary
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 | - an angle whose measure is greater than 0 but less than 90 degrees
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| Congruent angles | - two angles where one is the image of the other under a reflection or composite of reflections; written AB
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| Coplanar | - within the same plane
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| Midpoint | - the point M of where AM = AB
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| Perpendicular Lines | - 2 segments, rays, or lines that form a 90 degree angle
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| Ray | - a one-dimensional figure that consists of one endpoint A, one point B, all of the points on , and all points for which B is between them and A; written
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| Space | - the set of all possible points; made up of infinite planes
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| Angle | - the union of 2 rays that have the same endpoint; measured in degrees or radians (trig.); the five types of angles are zero, acute, right, obtuse, and straight
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| Congruent segments | •Congruent Segments have the same length.
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| counter-example | -a situation in a conditional for which the antecedent is true, but the conditional is false; aka contradiction
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| obtuse angle | - an angle whose measure is greater than 90 but less than 180 degrees; see acute angle
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| plane | - a two-dimensional group of points that goes on infinitely in all directions; made up of infinite lines
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| right angle | -measures 90 degrees
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| angle bisector | An angle bisector is a ray that cuts the angle exactly in half, making two equal angles.
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| conjecture | is believed to be true but not yet proved.
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| inductive reasoning | is the process of arriving at a conclusion based on a set of observations.
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| opposite rays | - two rays with a common endpoint that form a line
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| point | - a zero-dimensional figure; while usually left undefined
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| segment | the set of points consisting of two distinct points and all inbetween them; written
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| collinear | - in the same line
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| coordinate | - a number that identifies (or helps to identify) a point on a number line (or on a plane, or in space)
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| line | - a two-dimensional object that has no endpoints
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| parallel lines | Two lines in the same plane which never intersect are called parallel lines
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| postulate | - a statement assumed to be true without proof
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| skew line | - non-coplanar lines that don't intersect
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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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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.
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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