Geometry-Circles-Theorums Flashcards Preview

K 8th Grade > Geometry-Circles-Theorums > Flashcards

Flashcards in Geometry-Circles-Theorums Deck (18)
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1
Q

Tangent Theorum

A

A tangent to a circle is perpendicular to the radius drawn to the point of tangency.

2
Q

Tangent Segment Thrm

A

Tangent segments to a circle from a point outside the circle are congruent.

3
Q

Chords Central Angle Theorum

A

If Chords are equal, then central angles are equal.

4
Q

chord Arcs Thrm

A

If the chords are congruent, then the arcs are equal.

5
Q

Perpendicular to a Chord Thrm

A

Perpendicular from center to a chord also bisects the chord.

6
Q

Chord Distance to Center Thrm

A

two congruent chords are equidistant to the center.

7
Q

Perpendicular bisector of a Chord Thrm

A

Perpendicular bisector of a chord passes through the center.

8
Q

Inscribed Angle Thrm

A

The measure of an angle in a circle is half the measure of the captured arc.

9
Q

Inscribed Angles Intercepting Arcs Thrm

A

Inscribed angles that intercept the same arc are congruent.

10
Q

Angles inscribed in a Semicircle Thrm

A

Angles inscribed in a semicircle are right angles.

11
Q

Cyclic Quadrilateral Thrm

A

The opposite angles of a cyclic quadrilateral are supplementary.

12
Q

Parallel Lines Intercepted Arcs Thrm

A

Parallel lines intercept congruent arcs on a circle.

13
Q

Vertical Angle Theorum

A

If two angles are vertical angles, then they have equal measures (they are congruent).

14
Q

Triangle Sum Theory

A

Sum of all angles in triangle is 180 degrees.

15
Q

Isosceles Triangle Thrm.

A

If a triangle is isosceles, then the base angles are equal, Converse is also true

16
Q

Quadrilateral Sum Thrm

A

The sum of the angles in a quadrilateral is equal to 360.

17
Q

Polygon Sum Thrm

A

Sum of measures of n interior angles of an n-gon is 180(n-2).

18
Q

Equiangular Polygon Thrm

A

You can find the measure of each interior angle of an equiangular n-gon by this formula (180 (n-2))/n

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