Circles - SAT Math
Card 0 of 10
Define a chord.
Define a chord.
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A segment connecting two points on the circle.
A segment connecting two points on the circle.
Equation of a circle with center $(h, k)$ and radius $r$.
Equation of a circle with center $(h, k)$ and radius $r$.
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$(x - h)^2 + (y - k)^2 = r^2$.
$(x - h)^2 + (y - k)^2 = r^2$.
Formula for arc length.
Formula for arc length.
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$s = \frac{\theta}{360^{\circ}} \times 2\pi r$.
$s = \frac{\theta}{360^{\circ}} \times 2\pi r$.
Formula for area of a circle.
Formula for area of a circle.
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$A = \pi r^2$.
$A = \pi r^2$.
Formula for area of a sector.
Formula for area of a sector.
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$A = \frac{\theta}{360^{\circ}} \times \pi r^2$.
$A = \frac{\theta}{360^{\circ}} \times \pi r^2$.
Formula for circumference of a circle.
Formula for circumference of a circle.
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$C = 2\pi r$.
$C = 2\pi r$.
If a tangent and secant are drawn from a point outside a circle, relation between lengths.
If a tangent and secant are drawn from a point outside a circle, relation between lengths.
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$t^2 = e(e + s)$, where $t$ is tangent, $e$ is external part of secant, $s$ is internal segment.
$t^2 = e(e + s)$, where $t$ is tangent, $e$ is external part of secant, $s$ is internal segment.
Relationship between a central angle and its intercepted arc.
Relationship between a central angle and its intercepted arc.
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They have equal measures.
They have equal measures.
Relationship between radius and tangent.
Relationship between radius and tangent.
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A radius is perpendicular to the tangent at the point of tangency.
A radius is perpendicular to the tangent at the point of tangency.
When is the solution of an inequality written with an open circle on a number line?
When is the solution of an inequality written with an open circle on a number line?
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When the inequality is strict ($<$ or $>$).
When the inequality is strict ($<$ or $>$).