Term
altitude of a parallelogram altitude of a trapezoid altitude of a triangle 

Definition
__________ of a parallelogram: A perpendicular segment that connects the line containing one base of parallelogram with the side opposite that base. __________ of a trapezoid: A perpendicular segment from a line containing one of the parallel sides of a trapezoid (a base) to the line containing the side opposite that base. __________ of a triangle: A perpendicular segment that connects one vertex of a triangle with the line containing the side opposite that vertex. 


Term

Definition
A perpendicular segment connecting the center of a regular polygon and one of the sides of the regular polygon. 


Term
center (of a regular polygon) 

Definition
The point that is equidistant from all vertices of a regular polygon. 


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Definition
The perimeter ofâ€”or the distance arounda circle. 


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Definition
The statement formed by switching the hypothesis and conclusion of a conditional statement to form a new conditional statement. 


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Definition
The length of the altitude of a polygon. 


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Definition
The longest side in a right triangle. It is opposite the right angle in the right triangle. 


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Definition
The sum of the side lengths of a polygon. 


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Definition
A closed plane figure formed from three or more segments such that each segment intersects exactly two other segments, one at each endpoint, and no two segments with a common endpoint are collinear. 


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Definition
A statement that is accepted as true without proof.
(Also known as an axiom). 


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Definition
A polygon that is equiangular and equilateral. That is, all of its angles have the same measure, and all of its sides have the same measure. 


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Definition
An angle whose measure is 90 degrees. 


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Definition
A statement that has been proven true using deductive reasoning. 

