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4th grade Geometry Vocab Review
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This has a point and extends endlessly in one direction.
ray
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When lines are __________, they continue on forever, the same distance apart, never intersecting.
parallel
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A part of a line that has two defined endpoints.
line segment
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A quadrilateral with 4 equal sides and 4 right angles
square
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A quadrilateral with 1 pair of parallel sides. It has two acute angles and two obtuse angles.
trapezoid
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When lines intersect and form a 90 degree angle, they are called __________.
perpendicular
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The point where two lines, line segments, or rays meet is called an __________.
angle
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A triangle with three congruent sides.
equilateral triangle
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A triangle with NO congruent sides.
scalene
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This is a straight path of points that go endlessly in both directions
line
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A quadrilateral with 4 equal sides.
rhombus
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An imaginary line where you could fold the image and have both sides match exactly.
line of symmetry
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A triangle with one angle greater than 90 degrees.
obtuse
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A triangle with one angle that is exactly 90 degrees.
right
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A quadrilateral with 2 pairs of parallel sides and 4 right angles. Opposite sides are congruent.
rectangle
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What is a polygon that has three sides and three angles?
triangle
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A polygon with four sides and four angles
quadrilateral
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A triangle with 3 angles that are each less than 90 degrees.
acute
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What is a shape with AT LEAST three straight sides and angles?
polygon
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A quadrilateral with 2 pairs of parallel sides. Opposite sides are congruent.
parallelogram
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A triangle with two congruent sides.
isosceles
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