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rectangle

a parrallelogramnthat has four right angles,but does not have four equal sides.

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obtuse angle

an angle greater than 90 degress but less than 180 degress.

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decagon

a ten sided polygon.

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tiling

when you can fit polygons 360 degress around a point.

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hexagon

a six sided polygon.

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regular polygon

any polygon with all equal sides.

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right angle

an angle equal to 90 degress.

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square

a parallelogram with four right angles and four equal angles.

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octagon

an eight sided polygon.

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heptagon

a seven sided polygon.

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angle

is formed by two sides meeting a vertex in a polygon.

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degress

a unit of measurement for angles.

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equilateral triangle

is a triangle with all equal sides.

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isosceles triangle

a triangle with two equal sides.

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parallel lines

lines that never meet

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parallelogram

a 4 sided polygon where the opposite sides are an equal distance apart.

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pentagon

a 5 sided polygon.

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quadrilateral

any 4 sided polygon.

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scalene triangle

a triangle with no equal sides.

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polygon

a closed figure/straight sides/no intersections.

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rhombus

[all sides equal]one pair obtuse angle and one pair acute angle.

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dodecadon

a 12 sided ploygon.

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ninogon

a 9 sided polygon.

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quadrilatrals

a 4 sided polygon.

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triangle

a 3 sided polygon.

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