Quadrilaterals

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19 Terms

1
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Parallelogram

a quadrilateral with TWO PAIRS of parallel sides

<p>a quadrilateral with TWO PAIRS of parallel sides</p>
2
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Quadrilateral

a polygon with 4 sides, 4 vertices, and 4 angles

<p>a polygon with 4 sides, 4 vertices, and 4 angles</p>
3
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Rectangle

a parallelogram with 4 right angles and opposite equal sides

<p>a parallelogram with 4 right angles and opposite equal sides</p>
4
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Rhombus

a parallelogram with 4 equal sides and no right angles

<p>a parallelogram with 4 equal sides and no right angles</p>
5
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Square

a parallelogram with 4 right angles and 4 equal sides

<p>a parallelogram with 4 right angles and 4 equal sides</p>
6
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Right Angle

an angle that measures 90 degrees

<p>an angle that measures 90 degrees</p>
7
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Acute Angle

an angle that measures less than 90 degrees

<p>an angle that measures less than 90 degrees</p>
8
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Obtuse Angle

an angle that measures more than 90 degrees

<p>an angle that measures more than 90 degrees</p>
9
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Parallel Lines

two lines that will never intersect

<p>two lines that will never intersect</p>
10
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Perpendicular Lines

two lines that intersect at a right angle

<p>two lines that intersect at a right angle</p>
11
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Trapezoid

a quadrilateral with only ONE PAIR of parallel sides

<p>a quadrilateral with only ONE PAIR of parallel sides</p>
12
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Vertex/Vertices

the place, or corner, where two sides meet

<p>the place, or corner, where two sides meet</p>
13
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Polygon

a figure with straight, closed sides

<p>a figure with straight, closed sides</p>
14
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Right Triangle

A triangle with a 90 degree angle

<p>A triangle with a 90 degree angle</p>
15
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Acute Triangle

A triangle with 3 acute angles

<p>A triangle with 3 acute angles</p>
16
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Obtuse Triangle

A triangle with 1 obtuse angles

<p>A triangle with 1 obtuse angles</p>
17
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Equilateral Triangle

A triangle with 3 equal sides

<p>A triangle with 3 equal sides</p>
18
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Isosceles Triangle

A triangle with 2 equal sides

<p>A triangle with 2 equal sides</p>
19
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Scalene Triangle

A triangle with no equal sides

<p>A triangle with no equal sides</p>