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36 Cards in this Set
 Front
 Back
There are ___ all the way around a circle. 
360 degrees 

All radii of any circle are ______. 
Congruent. 

The diameter is______ times the radius 
2 

All diameters ___ pass through the center of the circle. 
must 

Any angle inscribed inside a circle, with both end points on the diameter, measures ____. 
90 degrees 

Line segment AB is called a ___. 
Chord 

Line segment AB is called a ___. 
Chord 

Circumference = ___ times the diameter, or 2 ____ times the radius. 
Pi 

Area of a circle 
Pi times the radius squared 

Area of a circle 
Pi times the radius squared 

Let circle with center O be as shown. Then 
The measure of angle ADC = 2 times the measure of angle ABC. 

A ____ is any polygon that has 4 sides. 
Quadrilateral 

If a quadrilateral is inscribed in a circle, then ___. 
Opposite corners' angles are supplementary. 

All the angles in a quadrilateral add up to ___. 
360 degrees 

x = ___ 
24 degrees 

x = ___ 
13 degrees 

x = ___ 
54 degrees 

x = ___ 
26 degrees 

Any time the thing you're solving for is on the bottom of one side of the equation, ___. 
it switches places with the whole other side of the equation. 




Area of a regular polygon with n sides and radius r 
Back (Definition) 

Perimeter of a regular polygon with n sides and radius r 
Back (Definition) 

Front (Term) 
Back (Definition) 

45 degrees is ___ of 180 degrees 
1/4 

45 degrees is ___ radians. 
pi/4 

Pi/4 radians is ___ degrees. 
45 

150 degrees is ___ of 180 degrees. 
5/6 

150 degrees is ___ radians. 
5pi/6 

5pi/6 radians is ___ degrees. 
150 

75 degrees is ___ of 180 degrees. 
5/12 

75 degrees is ___ radians. 
5pi/12 

5pi/12 radians is ___ degrees. 
75 

Distance formula 


Midpoint formula 
Back (Definition) 

Formula for the slope of a line 
Back (Definition) 

Slope of the perpendicular line 
Opposite reciprocal of the slope of the original line 