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Level 83

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## Ignore words

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Trapezoid

A quadrilateral with exactly one pair of parallel sides.

Parallelogram

A quadrilateral whose opposite sides are parallel and equal, or congruent.

Rhombus

a parallelogram with four equal sides and equal opposite angles.

isosceles triangle

Triangle with 2 equal sides and 2 equal angles.

Scalene Triangle

A triangle with no congruent sides

Right Triangle

A triangle with one right angle.

acute triangle

A triangle with three acute angles.

obtuse triangle

A triangle with one obtuse angle.

equilateral triangle

Triangle with a 90° angle

polygon

a closed figure made by joining line segments where each line segment intersects exactly 2 others

Quadrilateral

A polygon with 4 sides and 4 angles.

decagon

a 10-sided polygon

regular polygon

a convex polygon in which all sides and angles are congruent