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Convex polygons triangles formula

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Geometry Math

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Mar 1, 2020

Cards (26)

Section 1

(26 cards)

Convex polygons triangles formula

Front

(n-2)

Back

Definition of circular region

Front

The union of the circle and it's interior

Back

The two secant power theorem

Front

PD x PC = PB x PA

Back

theorem : If an arc has mesure q and radius r, then it's length is

Front

q ---- x 2 pi r 370

Back

Area of a circle

Front

A=πr²

Back

Area of a sector of a circle

Front

q ---- x pi r^2 360

Back

The two tangent theorem

Front

If 2 tangent segments are drawn to a circle from an external point, then those segments and interior angles are congruent.

Back

How to find sum of exterior angle of polygons

Front

180n-(n-2)180

Back

Definition of Regular Polygon

Front

A regular polygon is a convex polygon whose angles are all congruent and whose sides are all congruent

Back

defintion of center or regular polygon

Front

The polygon inscribed in a circle have the same centers

Back

Perimeter of a regular polygon

Front

P(perimeter)=n(number of sides)s(length of side) p=ns

Back

The two chord power theorem

Front

AE x EB = DE x EC

Back

Theorem

Front

The ratio of the circumference to the diameter is the same for all circles

Back

Definition of a Polygon

Front

A polygon is a connected set of at least three line segments in the same plane such that each segment intersects exactly two others, one at each endpoint

Back

tangent segment

Front

the part of a tangent line between the point of contact and a point outside the circle

Back

Definition of segment of circle

Front

A sector minus the triangle made by endpoints

Back

secant segment

Front

a segment of a secant line that has exactly one endpoint on the circle

Back

How to find sum of interior angles of polygons

Front

(n-2)180

Back

Area of a regular polygon

Front

A=1/2(apothem)(perimeter) A=ap

Back

Theorem

Front

If two arcs have equal radii, then their lengths are proportional to their measures

Back

Diagonals of polygons formula

Front

n(n-3) ------- 2

Back

The tangent secant power theorem

Front

c x b = a^2

Back

Defintion of sector

Front

The union of the arc and interior of the circles area

Back

Defintion of circumference of a circle

Front

C=pi x diameter c = 2r pi

Back

apothem of a regular polygon

Front

the perpendicular distance from the center of the polygon to a side

Back

convex polygon

Front

a polygon such that no line containing a side of the polygon contains a point in the interior of the polygon

Back