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Geometry Terms

This Question Set contains a compiled list of geometry terms. Though not a conclusive list, it has over 30 definitions. Because of the amount of questions and answers it could be used for a group game like BINGO or Play on Words.

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Below are the pre-made questions and answers for this Question Set. You will have an opportunity to modify, add or delete any of the questions before you create your game.

an angle less than 90 degrees but more than 0 degrees~acute angle
a triangle whose interior angles are all acute~acute triangle
elevation above sea level or above the earth’s surface~altitude
the space between two lines or planes that intersect~angle
a continuous portion of a circle~arc
an area that is in the middle of some larger region~center
in or near an inner area~central
a combination of three or more notes that blend harmoniously~chord
ellipse in which the two axes are of equal length~circle
the length of the closed curve of a circle~circumference
two angles whose sum is a right angle~complementary angles
a shape with a circular base and sides tapering to a point~cone
corresponding in character or kind~congruent
of equal importance, rank, or degree~coordinate
lying in the same plane~coplanar
ratio of the adjacent side to the hypotenuse of a right-angled triangle~cosine
a surface generated by rotating a line around a fixed line~cylinder
a specific identifiable position in a continuum or series~degree
the length of a straight line through the center of a circle~diameter
the property created by the space between two objects~distance
a three-sided regular polygon~equiangular triangle
a three-sided regular polygon~equilateral triangle
being essentially equal to something~equivalent
the supplement of an interior angle of a polygon~exterior angle
the mean of n numbers expressed as the n-th root of their product~geometric mean
written on or in a surface~inscribed
a triangle with two equal sides~isosceles triangle
determine the dimensions of something or somebody~measure
relating to or situated in or extending toward the middle~median
a point equidistant from the ends of a line or the extremities of a figure~midpoint
an angle between 90 and 180 degrees~obtuse angle
a triangle that contains an obtuse interior angle~obtuse triangle
being everywhere equidistant and not intersecting~parallel
a quadrilateral whose opposite sides are parallel and equal~parallelogram
a line enclosing a plane area~perimeter
a closed plane figure bounded by straight sides~polygon
a solid figure bounded by plane polygons or faces~polyhedron
a polyhedron with two congruent and parallel faces~prism
relation with respect to comparative quantity or magnitude~proportion
a polyhedron having a polygonal base and triangular sides~pyramid
a four-sided polygon~quadrilateral
a straight line from the center to the perimeter of a circle~radius
relation with respect to comparative quantity or magnitude~ratio
a group of nearly parallel lines of electromagnetic radiation~ray
a parallelogram with four right angles~rectangle
having four right angles~rectangular
a polygon with all sides and all angles equal~regular polygon
a parallelogram with four equal sides~rhombus
the 90 degree angle between two perpendicular lines~right angle
a triangle with one right angle~right triangle
a triangle with no two sides of equal length~scalene triangle
a straight line that intersects a curve at two or more points~secant
a particular aspect of life or activity~sector
one of several parts that fit with others to make a whole~segment
the quality of being alike~similarity
ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle~sine
be at an angle~slope
a round three-dimensional closed surface~sphere
a polygon with four equal sides and four right angles~square
a quantity obtained by the addition of a group of numbers~sum
the extent of a 2-dimensional surface enclosed within a boundary~surface area
a line that touches a curve but does not intersect it~tangent
the act of changing in form or shape or appearance~transformation
extending or lying across~transversal
a quadrilateral with two parallel sides~trapezoid
a three-sided polygon~triangle
poorly balanced or matched in quantity or value or measure~unequal
either of two equal and opposite angles formed by the intersection of two straight lines~vertical angle

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