###
rectangle

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

###
obtuse angle

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

###
decagon

a ten sided polygon.

###
tiling

when you can fit polygons 360 degress around a point.

###
hexagon

a six sided polygon.

###
regular polygon

any polygon with all equal sides.

###
right angle

an angle equal to 90 degress.

###
square

a parallelogram with four right angles and four equal angles.

###
octagon

an eight sided polygon.

###
heptagon

a seven sided polygon.

###
angle

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

###
degress

a unit of measurement for angles.

###
equilateral triangle

is a triangle with all equal sides.

###
isosceles triangle

a triangle with two equal sides.

###
parallel lines

lines that never meet

###
parallelogram

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

###
pentagon

a 5 sided polygon.

###
quadrilateral

any 4 sided polygon.

###
scalene triangle

a triangle with no equal sides.

###
polygon

a closed figure/straight sides/no intersections.

###
rhombus

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

###
dodecadon

a 12 sided ploygon.

###
ninogon

a 9 sided polygon.

###
quadrilatrals

a 4 sided polygon.

###
triangle

a 3 sided polygon.

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