Geometry-Circles-Theorums Flashcards Preview

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

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

Tangent Theorum

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

2

Tangent Segment Thrm

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

3

Chords Central Angle Theorum

If Chords are equal, then central angles are equal.

4

chord Arcs Thrm

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

5

Perpendicular to a Chord Thrm

Perpendicular from center to a chord also bisects the chord.

6

Chord Distance to Center Thrm

two congruent chords are equidistant to the center.

7

Perpendicular bisector of a Chord Thrm

Perpendicular bisector of a chord passes through the center.

8

Inscribed Angle Thrm

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

9

Inscribed Angles Intercepting Arcs Thrm

Inscribed angles that intercept the same arc are congruent.

10

Angles inscribed in a Semicircle Thrm

Angles inscribed in a semicircle are right angles.

11

Cyclic Quadrilateral Thrm

The opposite angles of a cyclic quadrilateral are supplementary.

12

Parallel Lines Intercepted Arcs Thrm

Parallel lines intercept congruent arcs on a circle.

13

Vertical Angle Theorum

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

14

Triangle Sum Theory

Sum of all angles in triangle is 180 degrees.

15

Isosceles Triangle Thrm.

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

16

Quadrilateral Sum Thrm

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

17

Polygon Sum Thrm

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

18

Equiangular Polygon Thrm

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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