SAT Math Reminders/Formulas

In a Standard Quadratic Equation, what does 'b' indicate? Reminder: y=ax^2+bx+c

'b' indicates a horizontal translation of the function

Standard Quadratic Equation Formula

y=ax^2+bx+c

In a Standard Quadratic Equation, what does 'a' indicate? Reminder: y=ax^2+bx+c

'a' indicates whether the function opens upwards or downwards, as well as how wide or narrow it is

In a Standard Quadratic Equation, what does 'c' indicate? Reminder: y=ax^2+bx+c

'c' is the y-intercept of the function

Circle formula

(x-h)^2 + (y-k)^2 = r^2

Sum of solutions in a quadratic equation?

-b/a

What are the 3 triangle similarity conditions?

1. Side-angle-side 2. Angle-Angle 3. Side-side-side

Sum of interior angles formula

180(n-2) where n is the # of sides

What does b^2-4ac < 0 indicate?

No solutions

What does b^2-4ac > 0 indicate?

Two solutions

What is the Angle-Angle triangle similarity condition?

If 2 corresponding angles of triangles are the same, then the triangles are similar

What is the Side-side-Side triangle similarity condition?

If three corresponding sides are proportional, then the triangles are similar

What is the Side-Angle-Side triangle similarity condition?

If two corresponding sides are proportional and the angle inscribed by those sides is the same, then the triangles are similar

What does b^2-4ac = 0 indicate?

One solution

What must the difference of two sides of a triangle be in relation to the third side?

The difference of two sides must be less than the third side.

What must the sum of two sides of a triangle be in relation to the third side?

The sum of two sides must be greater than the third side.

Product of solutions in a quadratic equation?

c/a