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49 Cards in this Set
 Front
 Back
Midpoint

(a+b)/2


Number of triangles in a polygon

n  2


Sum of interior angles of a regular polygon

180(n  2)


Measure of exterior angles of a regular polygon

360/n


Measure of interior angles of a regular polygon

s/n


Number of diagonals from any vertex in a regular polygon

n  3


Total number of diagonals

n(n  3)/2


Proportion

"P.O.M. = P.O.E.


a/b = c/d"

result of proportion is a RATIO OF SIMLITUDE or a SCALE FACTOR


Measure of a median of a triangle

1/2 base


distance formula

"the square root of


(x  x)2 + (y  y)2"



sine ()

opposite side / hypotenuse


cosine

adjacent side / hypotenuse


tangent

opposite side / adjacent side


measure of a central angle

#NAME?


measure of an inscribed angle

= 1/2 measure of intercepted arc


measure of an interior angle

= 1/2 sum of two intercepted arcs


measure of an exterior angle

= 1/2 difference of intercepted arcs


when a tangent segment intersects a secant segment...

tangent segment2 = outside times the whole thing.


when two secant segments intersect outside the circle....

the outside times the whole thing = the outside times the whole thing.


lateral area of a prism

perimeter of base x height


lateral area of a cylinder

2(pi)rh


total area of a prism and cylinder

lateral area + 2 (base area)


volulme of a prism

base area x height


volume of a cylinder

(pi)r2h


lateral area of a pyramid

slant height (perimeter) / 2


lateral area of a cone

(pi)r x slant height


total area of a cone and pyramid

lateral area + base area


area of a sphere

4(pi)r2


volume of a sphere

4(pi)r3/3


# of faces

s + 2


# of verticies

2s


# edges

3s


perimeter of a polygon

sum of sides


circumference of a circle

(pi)d


length of an arc

m. of arc x circumference/360


area of a parallelogram

bh


area of a rhombus, square, kite

d x d/2


area of a triangle

bh/2


area of a triangle (w/ semiperimeter)

"square root of


s(sa)(sb)(sc)"



area of an equilateral triangle

s2 / 4 (square root of 3)


area of a trapezoid

(b + b)h/2


area of a circle

(pi)r2


area of a regular polygon

ap/2


area of a sector

m. of arc x area of circle / 360


area of a segment

area of a sector  area of a triangle


area of a triangle (w. sine)

1/2ab sine c
