Flashcards in Formulas to remember Deck (8)
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1
Midpoint equation
( X1 + X2 / 2 ) , ( Y1 + Y2 / 2 )
2
Distance equation
Root (x2-x1)^2 + (y2-y1)^2
3
Here are 3 vertices (-2,5) (3,0) (-3,-2)
Show it is isosceles and name the equal sides
Find the midpoint of the third side
Find the area
Use Pythagoras to find the lengths of each side
(this shows the isosceles lengths)
Use the midpoint equation to find midpoint of last side
Connect A to Midpoint, find the length using equation
Area = 1/2 AM x Base
4
Gradient equation
(y2-y1) / (x2-x1)
5
Is it a parallelogram?
Find the gradient of 2 opposing lines, if they have the same gradient they are parallel and therefore a parallelogram
6
Perpendicular gradient?
Negative reciprocal
4/3 becomes -3/4
7
How to show a shape is rectangular?
Find its area
Show 2 of the lines are perpendicular (times to give -1)
Find the distance of 2 perpendicular lines, times them
8
