Circle Geometry.
Diameter- the distance across a circle, measured through its
center; or the line segment that joins two points on
the circle and passes through the center.
Radius- the distance or line segment from the center of a
circle to any point on the circle.
Chord- a line segment that joins two points on a circle.
Arc- A segment of the circumference of a circle.
Minor Arc- The shorter of two arcs between two points on a circle.
Tangent- a line that intersects a circle at only one point.
Point of Tangency- the point where a tangent intersects a circle
Central Angle- An angle whose arms are radii of a circle.
Inscribed Angle- An angle in a circle with its vertex and endpoints
of its arms on the circle.
center; or the line segment that joins two points on
the circle and passes through the center.
Radius- the distance or line segment from the center of a
circle to any point on the circle.
Chord- a line segment that joins two points on a circle.
Arc- A segment of the circumference of a circle.
Minor Arc- The shorter of two arcs between two points on a circle.
Tangent- a line that intersects a circle at only one point.
Point of Tangency- the point where a tangent intersects a circle
Central Angle- An angle whose arms are radii of a circle.
Inscribed Angle- An angle in a circle with its vertex and endpoints
of its arms on the circle.
![Picture](/uploads/2/8/6/5/28654611/896290.png)
A tangent to a circle is perpendicular to the radius
at the point of tangency.
APO =
BPO = 90 degrees.
at the point of tangency.
APO =
BPO = 90 degrees.
![Picture](/uploads/2/8/6/5/28654611/876218.png)
A) Point O is the center of a circle and AB is tangent to the circle. In OAB,
AOB = 550
Determine the measure of OBA.
Since
A = 900
and
0 = 55
Then 90 + 55 = 145
The three angles in a triangle
add to 1800
. So
x = 180 –
145 = 350
.
AOB = 550
Determine the measure of OBA.
Since
A = 900
and
0 = 55
Then 90 + 55 = 145
The three angles in a triangle
add to 1800
. So
x = 180 –
145 = 350
.