Quadrilaterals (8) Flashcards
1
Q
Trapezoid area
A
A = (b1 + b2 / 2) x h (averaging out bases)
2
Q
Isoceles triangle ratios
A
x : x : x rt 2
3
Q
Area of equilateral triangle
A
(s^2 sqrt 3) / 4
4
Q
In a parallelogram, opposite angles and sides are…
A
Equal
5
Q
Remember, the triangle ratio of x - x - x rt 2 is a RATIO.
A
Doesn’t mean you’ll always have rt 2 in the answer choices
6
Q
Polygons with more than 4 sides…
A
n - 2 x 180
7
Q
Number of diagonals in an N sided polygon…
A
n(n-3) / 2
8
Q
Every square is a rhombus…
A
However, not every rhombus is a square
9
Q
In border problems, remember to…
A
Account for both sides
10
Q
Diagonal of a square divides the square into…
A
Two isoceles triangles, which you know the ratio of
