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Definition
If a side of a right triangle is one of the two sides that form the right angle, then the side is called a(n) __________ of that right triangle 


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Definition
The leg of a right triangle that—along with the hypotenuseforms a particular acute angle of a triangle is called the __________. 


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The leg of a right triangle that is not one of the sides that form a particular acute angle of a right triangle is called the __________. 


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The __________ is the ratio of the length of the leg opposite an acute angle in a right triangle to the length of the leg adjacent to the same angle in a right triangle 


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Definition
The __________ is the ratio of the length of the leg opposite a particular acute angle in a right triangle to the length of the triangle’s hypotenuse 


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Definition
The __________ is the ratio of the length of the leg adjacent to a particular acute angle in a right triangle to the length of the triangle’s hypotenuse 


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Definition
Iff two lines are __________, then they intersect to form a right angle. 


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Definition
Iff two lines in a plane never intersect, then they are __________. 


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The __________ is a downward angle from a horizontal line. It's the angle formed by 1) an imaginary line from a given point that is parallel to the horizon and 2) another imaginary line from that same point to a point that is below the horizon 


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Definition
The __________ is an upward angle from a horizontal line. It is the angle formed by 1) an imaginary line from a given point that is parallel to the horizon and 2) another imaginary line from that same point to a point that is above the horizon 


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Definition
Iff a segment passes through the center of circle and its endpoints lie on the circle, then the segment is a(n) __________ of the circle. 


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Definition
Iff one endpoint of a segment is the center of a circle and the other endpoint lies on the circle, then the segment is a(n) __________ of the circle. 

