Mental Maths

What is a line segment from the center to the circumference called?
Radius
 
What is the line that is across the circle called?
Diameter
 
What is the line that touches the circle at one point?
Tangent
 
Which of these is not a trigonometric ratio? hypotenuse, sin, cos, tan,
Hypotenuse
 
The longest side of a triangle is the....?
Hypotenuse
 
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