Vocab
What is the Point of tangency?
the point where the tangent meets the circle.
What is a Chord in geometry terms?
A line segment that connects two opposing sides of a circle through the connection of both endpoints on the perimeter.
How do you central angle when you know the measure of its arc?
They are the same in measure
Whats the equation for arc length?
s=2pi r / x/360
What is the measure of a central angle if the arc it intercepts is 85 degrees
ITS 85 DEGREEEEEESS!
What is an Arc?
An arc is an outside curved edge of a circle
(A segment is to a line as an arc is to a circle.)
What is a Semi circle?
Half a circle so it measures 180 degrees and the central angle is created by a diameter.
What forms an arc
2 radii
How do I find the angle formed by a tangent?
it is two times the intercepting arc length.
A tangent and a chord interseta at the point of tangency, the arc created measures 80 degrees how much does the angle measure?
40 DEGREESSSS
What is a sector?
A portion of a circle enclosed by two radii and an arc to form whats called a segment.
What is a central angles? How do you find it?
Def: Is an angle who's vertex is at the center of the circle.
The central angle is equal to the arc that it intercepts.
What are congruent arcs?
Two arcs in the same circle or in identical (congruent) circles that have the exact same measure and length.
Whats the equation of a circle?
r ^2 =(x-h)^2+ (y-k)^2
At 11 o'clock the hands of a clock form an angle of what degree?
an acute angle,
30 degrees!
What is a Tangent?
A coplanar line that intersects a circle at a single point.
What are the three types of Arcs?
Minor Arc
Major Arc
Semi Circle
What does it mean when chords are equidistant from the center?
IT MEANS THEY'RE PERPENDICULAR to the radii!
How do you find the length of an arc?
x/360 * 2 pi r
The radius of Our math teachers face happened to be 12 in long, whats the diameter???
24
What is a Secant?
A line that intersects a circle in two distinct points.
Whats the difference between a central angle and an inscribed angle.
A central angles vertex is in the center, and an inscribed angle's vertex is on the edge.
What do you get when you draw a radii to a point of tangency?
right angels
How do I find the length of a chord?
The Pythagorean theorem.
MAKE TRIANGLES
Why was the obtuse angel sad :(
Because he was never right!!!!! hehehehe