Geometry Flashcards
A Triangle has how many sides and what is the sum of interior angles?
3 sides & 180º
A Quadrilateral has how many sides and what is the sum of interior angles?
4 sides & 360º
A Pentagon has how many sides and what is the sum of interior angles?
5 sides & 540º
A Hexagon has how many sides and what is the sum of interior angles?
6 sides & 720º
For every additional side it adds how many degrees to the sum of the interior angles?
180º
Area of a Triangle
A = (B x H) / 2
Area of Rectangle
A = (B x H)
Area of a Trapezoid
A = ((Base1 + Base 2) x Height) / 2
Area of any Parallelogram
A = B x H
Area of Rhombus
A = (Diagonal1 + Diagonal2) / 2
Diagonal of a Square
d = s(sqrt 2)
Diagonal of a Cube
d = s(sqrt 3)
Diagonal of a Rectangle
d² = x² + y² + z²
Common Triangle 1
3-4-5
Common Triangle 2
5-12-13
Common Triangle 3
8-15-17
Cylinder Surface Area
2 circles + rectangle = 2πr² + 2πrh
Volume of a Cylinder
V = πr²h
The Two Major Line-Angle Relationships that you must know
1) The angles formed by intersecting lines
2) The angles formed by parallel lines cut by a transversal
Finding the slope of a line using 2 points
y2 - y1 / x2 - x1
