vocabulary for RISD's 3rd 9 weeks
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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| line | a straight path that extends infinitely in opposite directions
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| line segment | a part of a line with 2 endpoints
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| midpoint | the point on a line segment that divides it into 2 congruent parts
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| ray | a part of a line that has one endpoint and extends forever in the opposite direction
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| intersecting lines | two lines that cross at exactly one point
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| perpendicular lines | lines that intersect at one point and form right angles
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| parallel lines | two lines in the same plane that never intersect
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| skew lines | lines that lie in different planes and are neither parallel nor intersecting
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| right angle | an angle with a measure of 90 degrees
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| obtuse angle | an angle with a measure of more than 90 degrees but less than 180 degrees
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| acute angle | an angle that measures greater than 0 degrees and less than 90 degrees
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| adjacent angles | angles that share a common ray, have a common vertex and do not overlap
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| vertical angles | a pair of opposite congruent angles formed by intersecting lines
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| vertex/vertices | the point where 2 rays meet, where 2 sides of a polygon meet, or where the edges of a 3-dimensional shape meet; the top point of a cone or pyramid
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| straight angle | an angle whose measure is 180 degrees
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| right triangle | a triangle with one right angle
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| obtuse triangle | a triangle with one obtuse angle
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| acute triangle | a triangle with 3 acute angles
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| scalene triangle | a triangle with no congruent sides
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| equilateral triangle | a triangle with 3 equal sides
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| isosceles triangle | a triangle with two congruent sides
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| congruent | having the same shape and the same size
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| symmetry | a figure has line symmetry if a line can divide the figure into 2 congruent parts
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| transformation | a change in size, shape, or position of a geometric figure
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| reflection | a transformation that produces a mirror image of a geometric figure (flip)
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| translation | a transformation that moves a geometric figure by sliding each of the points the same distance in the same direction (slide)
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| rotation | a transformation of a figure by turning it about a fixed point (turn)
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| quadrilateral | a four sided polygon
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| pentagon | a five sided polygon
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| hexagon | a six sided polygon
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| octagon | an eight sided polygon
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| decagon | a ten sided polygon
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| rhombus | a parallelogram whose 4 sides are congruent and whose opposite angles are congruent
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| parallelogram | a quadrilateral with opposite sides parallel and congruent
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| trapezoid | a quadrilateral that only has one pair of parallel sides
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| polygon | a closed figure made of line segments
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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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| prism | a 3 dimensional shape with 2 parallel, congruent bases; all other faces are parallelograms
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| cylinder | a 3 dimensional figure with 2 parallel bases that are congruent circles
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| sphere | a 3 dimensional shape with all points an equal distance from the center
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| cone | a 3 dimensional shape with a circular base, a curved surface, and one vertex
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| face | a flat surface of a 3 dimensional shape
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| edge | the line segment where 2 faces of a 3 dimensional shape meet
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| customary system of measurement | the measurement system used most often in the United States
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| Metric System of Measurement | a measurement system used throughout the world based on multiples of 10
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| gram | a standard unit for measuring mass (weight) in the metric system
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| liter | a metric system of measurement for capacity
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| meter | a metric system unit for measuring distance
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| capacity | a measure of liquid a container will hold
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| degree | a unit of measure for angles and for temperature
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| area | the number of square units needed to cover a surface (all of the inside of a shape)
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| perimeter | the distance around a 2 dimensional shape
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| Pi | the ratio of the circumference of a circle to its diameter
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| circumference | the distance around a circle
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| radius | a line segment from the center of a circle to any point on the circle
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| central angle | an angle that has its vertex at the center of a circle
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| chord | a line segment whose endpoints are on the circle
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| volume | the number of cubic units needed to fill the space occupied by a solid
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| diameter | a line segment that passes through the center of a circle and has endpoints on the circle
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| cubic units | what volume is measured in
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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:
ltimmermann
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