Vocab for 9.5 - 9.7 Course 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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| Point | Usually labeled with an uppercase letter, such as A or B
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| Line | Extends without end in two opposite directions
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| Ray | Has one endpoint and extends without end in one direction.
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| Segment | Has two endpoints
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| Plane | A flat surface that extends without end in all directions
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| Two different lines | Either intersect or are parallel
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| Intersecting Lines | Meet at a point
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| Parallel lines | Never meet
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| Angle | Formed by two rays with the same endpoint
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| Vertex | The angle; the point where two line segments meet.
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| Degrees | Measurement of angles
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| Right angle | An angle that measures 90 degrees
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| Acute angle | An angle that measures below 90 degrees
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| Obtuse angle | An angle that measures between 90 and 180 degrees
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| Straight angle | An angle that measures exactly 180 degrees; looks like a straight line
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| Vertical angles | Angles across from each other that have equal measures
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| Complementary angles | two angles that add up to 90 degrees
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| Supplementary angles | two angles that add up to 180 degrees
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| Triangle | A closed plane figure with three straight sides that connect three points
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| Acute triangle | has three acute angles
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| Right triangle | has one right angle
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| Obtuse triangle | has one obtuse angle
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| Equilateral triangle | has three sides the same length
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| Isosceles triangle | has at least two sides of the same length
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| Scalene triangle | has three sides of different lengths
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| Quadrilateral | A plane figure formed by 4 segments called sides
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| Parallelogram | A quadrilateral with 2 pairs of parallel sides
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| Rectangle | A parallelogram with 4 right angles
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| Rhombus | A parallelogram with 4 sides of equal length
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| Square | A parallelogram with 4 sides the same length and 4 right angles
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| Polygon | closed figure that is formed by three or more segments called sides
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| 3 sides | Triangle
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| 4 sides | Quadrilateral
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| 5 sides | Pentagon
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| 6 sides | Hexagon
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| 8 sides | Octagon
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| Regular Polygon | Polygon with equal side lengths and equal angle measures
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| Diagonal | Connects two opposite angles of the polygon
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| Congruent | Having the same shape and same size
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| Similar | Having the same shape, but not necessarily the same size
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| Corresponding parts | the matching sides and angles of two figures
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| Line symmetry | if a line can be drawn that divides the figure in two congruent parts that are mirror images of each other
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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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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.
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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