Formulas
Formula of a trapezoid
a = 1/2h (b1b2)
What is a magnitude without direction?
scalar
How many degrees are in a quadrilateral?
360
What is the property that states any corresponding lines in similar triangles have lengths that are proportional with each other
similar triangle property
a/h
area of a triangle with no height given
a = *square root* s(s-a)(s-b)(s-c)
what is a name of the vector that is from the initial point of the first vector to the terminal point of the last vector and found by vector addition
resultant
Which quad has noncongruent opp sides
kite
One method of proving triangles similar
aa, sss, sas
Triangulating a polygon subdivides a n-gon into which number of triangles
n-2
What is the area formula to find a quadrilateral with perpendicular diagonals?
A = 1/2 d1d2
which form uses the angled bracket notation
component form
what shape's area is this? A=BH
rectangle/parallelogram
the measure of the ??? on the hypotenuse of a right triangle is always the GM between the measures of the segments of the hypot
altitude
what is the ratio of the sides of 30-60-90 triangle?
1:2:*square root* 3
What is the Law of Sines
a/sin A = b/sin B = c/sin C
formula used to find the component form of a vector when given the initial and terminal point
< x2-x1 , y2-y1 >
The areas of 2 similar polygons are ??? to the squares of the scale factor
proportional
The midsegment of 2 sids of a triangle is always realted how to the 3rd side?
parallel
What do you use to solve for unknown angles in an equation?
Inverse trig functions
What is the Law of Cosines
a2 = b2+c2-2bc * Cos A
What is the name for the diagonal of a kite that divides a triangle into 2 congruent triangles
diagonal of symmetry
the opp angles of a parallelogram are always
congruent
What is the proportion of altitude?
x/y = y/z
tan of theta =
opp/adj