Cheatography
https://cheatography.com
this is a cheat sheet for the annoying circles and stuff
equationsDiameter | D = 2 × r | Circumference | C = 2 × π × r | Area | A = π × r2 |
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termsradius | the distance from the center of the circle to its outer rim | chord | a line segment whose endpoints are on a circle | diameter | a chord that passes through the center of the circle. the length of the diameter is two times the length of the radius | secant | a line that intersects a circle in two points | tangent | a line that intersects a circle in exactly one point | point of tangency | the point where the tangent touches the circle |
| | graphing circles(x-h)2+(y-k)2=r2 | h=the x axis, k= the y axis, and r =the radius | example: | (x-1)2 + (y+3) 2 =4 | radius=2 | center=(1,-3) |
arcs- the basicmajor arcs | arcs above 180 | minor arcs | arcs below 180 | semicircle | arc equivalent to 180 |
| | other sourcesarcs | | chords | | circles overview | | good luck friend:) | you got this |
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