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 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