Chapter 9 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 with a measure greater than 0 degrees and less than 90 degrees
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| acute triangle | a triangle having three acute angles
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| complementary angles | two angles are complementary if the sum of their measures is 90 degrees
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| congruent angles | angles with the same measure
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| congruent figures | figures that are the same shape and size
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| congruent segments | line segments that have the same length
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| corresponding sides | the parts of congruent or similar figures that match
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| degree | the most common unit of measure for angles
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| equilateral triangle | a triangle having all three sides congruent and all three angles congruent
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| isosceles triangle | a triangle in which at least two sides are congruent
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| line segment | a straight path between two endpoints
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| obtuse angle | a triangle having one obtuse angle
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| obtuse triangle | a triangle having one obtuse angle
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| parallelogram | a quadrilateral that has both pairs of opposite sides congruent and parallel
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| quadrilateral | a polygon with four sides
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| rectangle | a quadrilateral with opposite sides congruent and parallel and all angles are right angles
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| rhombus | a parallelogram with all sides congruent
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| right angle | an angle that measures 90 degrees
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| right triangle | a triangle having one right angle
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| scalene triangle | a triangle in which no sides are congruent
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| side | a ray that is part of an angle
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| similar figures | figures that have the same shape but different sizes
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| square | a parallelogram with all sides congruent, all angles right angles, and opposite sides parallel
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| straight angle | an angle that measures exactly 180 degrees
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| supplementary angles | two angles are supplementary if the sum of their measures is 180 degrees
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| tessellation | a pattern formed by repeating figures that fit together without gaps or overlaps
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| trapezoid | a quadrilateral with one pair of opposite sides parallel
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| vertex | the common endpoint of the two rays that form an angle
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| vertical angles | nonadjacent angles formed by a pair of lines that 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.
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:
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