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math 7 vocab
geometry vocabulary test words
| Question | Answer |
|---|---|
| the set of all points in a plane that are the same distance from a given point | circle |
| lines that lie in different planes that are neither parallel nor intersecting | skew |
| a straight path that extends without end in opposite directions | line |
| a flat surface that extends forever | plane |
| a part of a circle named by its endpoints | arc |
| the point where two sides intersect | vertex |
| lines that intersect to form right angles | perpendicular lines |
| a part of a line that starts at one endpoint and extends forever | ray |
| an angle that measures less than 90 degrees | acute angle |
| line segment with one endpoint at the center of a circle, the other endpoint on the circle | radius |
| having the same size and shape | congruent |
| a part of a line between two endpoints | line segment |
| two angles whose measures add to 90 degrees | complementary angles |
| an angle that measures 180 degrees | straight angle |
| The part of a circle enclosed by two radii and an arc connecting them | sector |
| a figure formed by two rays with a common endpoint | angle |
| a pair of opposite congruent angles formed by intersecting lines | vertical angles |
| an angle whose measure is greater than 90degrees but less than 180 degrees | obtuse angle |
| a line segment that passes through the center of a circle and has endpoints on the circle | diameter |
| an exact location in space | point |
| two angles whose measures have a sum of 180 degrees | supplementary angles |
| the point inside a circle that is the same distance from all points on the circle | center of the circle |
| an angle that measures 90 degrees | right angle |
| lines in a plane that do not intersect | parallel lines |
| a line segment with endpoints on a circle | chord |
| a line that intersects two or more lines | transversal |
| An angle formed by two radii | central angle |
| a closed plane figure formed by three or more line segments. | polygon |
| A line bounding a geometric figure | side |
| The point where two sides of a polygon intersect | vertex of a polygon |
| a polygon in which all sides are congruent and all angles are congruent | regular polygon |
| a triangle that has no congruent sides | scalene triangle |
| a triangle that has at least 2 congruent sides | isosceles triangle |
| a triangle with all sides congruent | equilateral triangle |
| a triangle with all angles less than 90 degrees | acute triangle |
| a triangle that has one obtuse angle | obtuse triangle |
| a triangle that has one right angle | right triangle |
| a quadrilateral with two pairs of parallel sides | parallelogram |
| a parallelogram with all sides congruent | rhombus |
| a parallelogram with 4 right angles | rectangle |
| a rectangle with 4 congruent sides | square |
| a quadrilateral with exactly one pair of parallel sides | trapezoid |
| a quadrilateral with two pairs of adjacent congruent sides | kite |
| A line segment that connects two non-adjacent vertices of a polygon | diagonal |
| A rule stating that if three sides of one triangle are congruent to three sides of another triangle, the triangles are congruent. | side-side-side rule |
| one-half is a mirror-image of the other half | line symmetry |
| The imaginary “mirror” in line symmetry | line of symmetry |
| Not identical on either side of a central line; not symmetrical | asymmetry |
| A figure has rotational symmetry if it can be rotated less than 360° around a central point and coincide with the original figure | rotational symmetry |
| The point about which a figure is rotated | center of rotation |
| A change in size or position of a figure | transformation |
| A figure resulting from a transformation | image |
| A movement (slide) of a figure along a straight line | translation |
| A transformation in which the figure is turned around a point | rotation |
| A transformation of a figure that flips the figure across a line | reflection |
| A line that a figure is flipped across to create a mirror image of the original figure | line if reflection |
| a polygon with 3 sides | triangle |
| a polygon with 4 sides | quadrilateral |
| a polygon with 5 sides | pentagon |
| a polygon with 6 sides | hexagon |
| a polygon with 7 sides | heptagon |
| a polygon with 8 sides | octagon |
| a polygon with 9 sides | nonagon |
| a polygon with 10 sides | decagon |
Created by:
mschuster
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