Linear Systems
Parallel Lines are
2 lines that will never meet
What is Pythagorean theorem? What is it used for?
A2+B2=C2
It is used to find a missing side of a triangle
F.O.I.L Stands for...
First, Outside, Inside, Last
What is the vertex of a parabola?
the lowest or highest point on the graph (depends on the opening of the parabola)
Y = mx + B is also known as
Slope intercept form
what is sine law? When is sine law used?
Sine law is... a / sinA = b / SinB = c / SinC
sine law is used when you have a pair of opposites and need to find out an angle or side length of a triangle
what is the greatest common factor?
the largest number that 2 numbers share that can multipy to make both numbers
What is the direction of opening?
where the gap of the parabola is
perpendicular lines are
lines that meet at a 90 degree angle
What is cosine law? when is cosine law used?
cosine law is a2 = b2 + c2 - 2bcCosA
you use cosine when you don't have a pair of opposites and you need to find sides/angles
What is the box method?
when you use a table to factor an equation.
what is the x/y intersept?
where the parabola crosses the x or y line
how do you change a normal math problem to slope y intercept form?
you need to first get y by itself and then divide the equation by __y (if you have 2y you would divide by 2 to get y)
how do you tell if 2 triangles are simular
the side lengths are multiples of the smaller triangle and the angles are the same
Factor (x-3)(x+4)
x2 + x - 12
what is the quadratic formula? What is it used for?
The quadratic formula is a formula used to solve quadratic equations. There will end up being 2 answers and those will be our X intercepts.
- see photo for the formula
To graph by finding the x and y intercepts....
you need to find the value of x and y by solving the equation so its x/y = ___ ( ___ = x/y also works) and then doing the other. then you plot them on the graph
how do you label a triangle properly?
lower case letters are always sides and capital letters are always angles
the opposite angle to a side is the same letter as that side but upper case
Whats the difference between simple and complex trinominal factoring.
complex trinominals have a coefficient infront, simple trinominals do not
what is the axis of symmetry
the line where both sides are symetrical