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a right triangle whose acute angles have measures of 30° and 60°. It results from cutting an equilateral triangle in half. 


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a right triangle whose acute angles each have a measure of 45°. It results from slicing a square in half along one of its diagonals. It is also referred to as an isosceles right triangle. 


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a segment that stretches from one vertex of a triangle to the line containing the side opposite that vertex and that is perpendicular to that opposite side. 


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the length of an altitude of a triangle 


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Definition
a relationship between the squares of the lengths of the sides of a right triangle where a and b represent the lengths of the legs of the right triangle and c represents the length of the hypotenuse of the right triangle. The theorem states that a^{2} + b^{2} = c^{2} 


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Definition
three natural numbers a, b and c that satisfy the Pythagorean theorem. That is a^{2} + b^{2}= c^{2} 


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a relationship between the squares of the lengths of the sides of a triangle, where a and b represent the lengths of the shorter sides of the triangle and c represents the length of the longest side of the triangle. There are three cases: a^{2} + b^{2} = c^{2}, which indicates a right triangle; a^{2} + b^{2} < c^{2} , which indicates an obtuse triangle; and a^{2} + b^{2} > c^{2}, which indicates an acute triangle 


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the number of nonoverlapping unit squares of a given size that will exactly cover the interior of a figure 


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the distance around a closed, plane figure 

