Geometry Explorations
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 with a measure less than 90 degrees
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| obtuse angle | an angle with a measure between 90 and 180 degrees
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| reflex angle | an angle with a measure between 180 and 360 degrees
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| right angle | an angle with a measure of 90 degrees
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| adjacent angles | two angles with a common side and vertex that do not overlap
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| arc | a part of a circle between and including two endpoints on the circle; named by its endpoints
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| pentagon | a 5-sided polygon
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| regular polygon | a polygon in which all sides are the same length and all angles have the same measure
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| center of a circle | the point in the plane of a circle equally distant from all points on the circle
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| radius of a circle | a line segment from the center of a circle or sphere to any point on the circle or sphere; half of the diameter
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| perimeter | the distance around the boundary of a 2-dimensional figure
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| circumference | the perimeter of a cirlce
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| diameter | a line segment that passes through the center of a circle or sphere and has endpoints on the circle or sphere
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| equilateral triangle | a triangle with all three sides equal in length; all angles measure 60 degrees
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| isosceles triangle | a triangle with at least two sides equal in length; angles opposite the congruent sides are congruent to each other
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| scalene triangle | a triangle with sides of three different lengths and three different angles
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| regular tessellation | a tessellation of one regular polygon
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| tessellation | a pattern of shapes that covers a surface completely without overlaps or gaps
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| vertical angles | the angles made by intersecting lines that do not share a common side; also called opposite angles; angles have equal measures
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| straight angle | an angle with a measurement of 180 degrees
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| congruent | figures having the same size and 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:
SarahMueller
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