Term
|
Definition
| A segment that joins two points in a circle |
|
|
Term
|
Definition
| Line that contains a chord |
|
|
Term
| If a line is tangent to a circle, |
|
Definition
| The lines is perpendicular to the radius drawn to the point of tangency |
|
|
Term
| if line in the plane of a circle is perpendicular to a radius at it's outer endpoint, |
|
Definition
| The line is tangent to the circle |
|
|
Term
| In the same circle or in congruent circles, |
|
Definition
| Two minor arcs are congruent if their central angles are congruent |
|
|
Term
| In the same circle or in congruent circles: |
|
Definition
1) congruent chords have congruent arcs
2) congruent arcs have congruent chords |
|
|
Term
| A diameter that is perpendicular to a chord bisects |
|
Definition
|
|
Term
| In the same or congruent circles |
|
Definition
1) conguent chords are equally distant from the center
2) chords equally distant from the center are congruent |
|
|
Term
| The measure of an inscribed angle is equal to |
|
Definition
| Half the measure of it's inerercepted arc |
|
|
Term
| The measure of an angle formed by a chord and a tangent is equal to |
|
Definition
| Half the measure of the intercepted arc |
|
|
Term
Re
The measure of an angle formed by two chords that intersect inside a circle is equal to |
|
Definition
Half the sun of the measures of the intercepted arcs
I.e. M<1=1/2( mAC+mBD) |
|
|
Term
| The measure of an angle formed by two secant , two tangents, or a secant and a tangent is equal to |
|
Definition
| Half the difference of the measures of the intercepted arcs |
|
|
