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### 49 Cards in this Set

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 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(s-a)(s-b)(s-c)" 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