Geometry 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 | measures less than 90 degrees
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Obtuse | measures more than 90 degrees and less than 180 degrees
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Right angle | measures exactly 90 degrees
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Straight angle | measures exactly 180 degrees (a straight line)
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Reflex angle | measures more than 180 degrees
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Intersecting | two (2) lines or segments that touch or cross each other
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Perpendicular | two(2) lines or segments that intersect at right angles
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Parallel | two (2) lines or segments that are the same distance apart at every point and will NEVER intersect
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Vertex | a corner of an angle or polygon (plural: vertices)
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Radius | the distance from the center of a circle to its surface
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Diameter | the distance of a line passing through the center of a circle to its surface (twice the radius)
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Perimeter | the length of the border (outside) of a 2-D shape
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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.
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.
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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Created by:
Bigelow6B
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