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# Geometry 7th grade

### Geometry terms from 7th grade textbook

Question | Answer |
---|---|

a location | point |

a series of points that extend in opposite directions without end | line |

part of a line with one endpoint and all the points of the line on one side of the endpoint. | ray |

part of a line with two endpoints and all points in between | segment |

one angle that is 90 degrees | right angle |

lines in the same plane that never intersect | parallel lines |

a figure formed by two rays with a common endpoint | angle |

a flat surface that extends indefinitely in all directions and has no thickness | plane |

when the sum of 2 angles is 180 degrees | supplementary |

when the sum of the measures of two angles are 90 degrees | complementary |

lines that have exactly one point in common | intersecting lines |

an angle between 90 degrees and 180 degrees | obtuse angle |

the point of intersection of two sides of an angle or figure | vertex |

lines that lie in different planes | skew lines |

angles that are formed by two intersecting lines and are opposite each other | vertical angles |

angles that share a vertex and a side but have no interior points in common | adjacent angles |

an angle with a measure between 0 degrees and 90 degrees | acute angle |

one angle that measures 180 degrees | straight angle |

angles with equal measures | congruent angles |

quadrilateral with 4 right angles and 4 congruent sides | square |

a segment that passes through the center of a circle and has both endpoints on the circle | diameter |

the point that divides a segment into two segments of equal length | midpoint |

lines that intersect to form right angles | perpendicular lines |

a line, segment, or ray that goes through the midpoint of a segment | segment bisector |

all sides congruent and all angles congruent | regular polygon |

a polygon with 8 sides | octagon |

a triangle with 3 congruent sides | equilateral triangle |

same size and same shape | congruent |

half of a circle | semicircle |

an angle with its vertex at the center of a circle | central angle |

quadrilateral with 4 congruent sides | rhombus |

quadrilateral with 2 pairs of opposite sides parallel | parallelogram |

a polygon with 6 sides | hexagon |

a triangle with 2 congruent sides | isosceles triangle |

a segment that has both endpoints on the circle | chord |

part of a circle | arc |

a quadrilateral with exactly one pair of parallel sides | trapezoid |

a polygon with 4 sides | quadrilateral |

set of points in a plane that are all the same distance from a given point, called the center | circle |

a segment that connects the center of a circle to the circle | radius |

sides are not congruent or all angles are not congruent | irregular polygon |

a polygon with 4 sides | decagon |

a triangle with no congruent sides | scalene triangle |

quadrilateral with 4 right angles | rectangle |

a polygon with 5 sides | pentagon |

the number of square units a figures encloses | area |

segment formed by the intersection of two faces | edge |

a perpendicular segment connecting one to another | base |

a figure with two congruent parallel bases that are circles | cylinder |

the middle point of a sphere | center of a sphere |

a cube whose edges are one unit long | cubic unit |

the distance around a circle | circumference |

a rectangular prism whose faces are all squares | cube |

a three-dimensional figure with one circular base and one vertex | cone |

a three-dimensional figure with two parallel and congruent polygon faces | prism |

a number that is the square of an integer | perfect square |

a flat surface of a three-dimensional figure that is a polygon | face |

how tall a polygon or a polyhedron is | height |

the ratio of the circumference of any circle to its diameter | pi |

the distance around a figure | perimeter |

in a right triangle, the hypotenuse is the longest side, which is opposite the right angle | hypotenuse |

a number that cannot be written as the ratio of two integers | irrational number |

a two-dimensional pattern that can be folded into a three-dimensional figure | net |

the two shortest sides of a triangle | legs |

a three-dimensional figure with triangular faces that meet at a vertex and a base that is a polygon | pyramid |

A squared plus B squared equals C squared | Pythagorean Theorem |

the number of cubic units needed to fill the space of a figure | volume |

any point where two sides meet a polygon | vertex |

is the set of all points in a space that are the same distance from the center | sphere |

a number is the inverse of squaring a number | square root |

figures that do not lie in a plane | three-dimensional figure |

the sum of the areas of its faces | surface area |

Created by:
connie1