Vocab words on geometry
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each of the black spaces below before clicking
on it to display the answer.
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| Geometry | The study of points lines angles surfaces and solids ?
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| Point | A location in space represented by a dot?
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| Line | A collection of points that extend forever in same direction?
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| Line segment | A part of a line that has 2 end points ?
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| Ray | A collection of points that begin at one point and extend forever ?
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| Angle | 2 rays with the same end point ?
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| Vertex | The point where 2 points meet?
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| Plane | A flat surface that extends forever in all directions ?
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| Parallel lines | Lines that are always same distance apart and will never cross each other?
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| Intersecting lines | Lines that cross each other in the same spot ?
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| Perpendicular lines | Intersecting lines that cross and make a right angle 90 degrees ?
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| Acute angle | A angle less than 90 degrees ?
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| Right angle | A perfect 90 degree angle ?
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| Obtuse angle | A angle that is greater then 90 but less then 180 degrees ?
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| Straight | A line that is flat 180 degrees?
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| Reflex angel | A angle that is between 180 and 360 degrees ?
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| Supplementary lines | 2 angles that equal to 180 degrees?
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| Complementary lines | 2 angles that equal to 90 degrees
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| Polygon | A closed plane figure with 3 or more sides triangle?
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| Triangle | A polygon with 3 sides?
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| Right triangle | A triangle with one 90 degree angle?
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| Obtuse triangle | A triangle that has one angle that is bigger than 90?
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| Acute triangle | All angles are less then 90 degrees
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| Scalene triangle | A triangle with no equal sides?
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| Isosceles triangle | A triangle with 2 equal sides ?
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| Equilateral triangle | A triangle with all equal sides
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| Quadrilateral | A polygon with 4 sides?
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| Square | A polygon with 4 equal sides and 4 right angles?
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| Rectangle | A 4 sided polygon with 4 right angles and 2 opposite angles are
Equal?
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| Rhombus | A polygon with 4 equal sides and opposite angles are equal?
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| Parallelogram | A 4 sided polygon with 2 equal and parallel sides?
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| Trapezoid | A 4 sided polygon with one pair of parallel sides and one pair of
Sides that are not parallel ?
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| Area | Number of square units needed to cover a region
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| Perimeter | The add up,of all sides around a shape
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| Area of square | Base x height
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| Area of rectangle | B x h
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| Area of triangle | 1/2 x b x h
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| Area of Parallelogram | A = b x h
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| Area of trapezoid | 1/2 x h ( b1 + b2 )
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| Altitude | Another word for height
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