Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

# 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