Formulas Flashcards
What is the equation for a straight line?
y=mx+c
What does m stand for?
Gradient
How do you find out the gradient?
Change in y
_______________
Change in x
What does c stand for?
Y intercept
What is the rule about interior angles?
Interior angles in an n-sided shape add up to 180(n-2)
What does anything to the power 0 equal?
1
In a simultaneous equation, what do you do if the signs are the same?
Subtract
In a distance - time graph what is the gradient equal to?
The speed
On a distance-graph, how do you work out the mean speed?
Total distance
________________
Total time
On a speed-time graph, what is the gradient equal to?
Acceleration
On a speed Time graph, what does a positive gradient mean?
Acceleration
On a speed time graph, what does a negative gradient mean?
Deceleration / retardation
In a table, how do you work out the mid-point?
a + b
_______
2
In Circle theorems, what is the rule about angle at the centre?
The angle at the centre is twice that at the circumference
In Circle theorems, what is the rule about angles on the same arc?
Angles at the circumference (standing on the same arc) are equal
In Circle theorems, what is the rule about a cyclic quadrilateral?
Opposite angles of a cyclic quadrilateral add up to 180
In Circle theorems, what is the rule about angles in a semicircle?
The angle in a semicircle is a right angle
In Circle theorems, what is the rule about tangents to circles?
The angle between a tangent and the radius drawn to the point is 90 degrees. The two tangents drawn from a single point are equal
In Circle theorems, what is the alternate segment theorem?
The angle between a tangent and a chord is equal to any angle made by that chord in the alternate segment
On a histogram, how do you work out the frequency density?
Class width
On a histogram, how do you work out the frequency?
Frequency density X class width
