19 - Coordinate Geometry Flashcards
1
Q
Just because the y-intercept is positive
A
doesn’t mean that the whole line doesn’t reach a negative area
2
Q
A
3
Q
A
4
Q
A
5
Q
A
6
Q
A
7
Q
A
8
Q
A
9
Q
A
10
Q
A
11
Q
Equation of a circle
A
(x-a)2 + (y-b)2 = r2
(x,y) = coordinates on the circumference
(h,k) = center point
r= radius of the circle
12
Q
Reflection over y=x
A
Switch the x and y coordinates
13
Q
Reflect over y=-x
A
Switch x and y AND flip signs
14
Q
A
15
Q
A
16
Q
A
17
Q
A
18
Q
A
19
Q
A
20
Q
A
21
Q
A
22
Q
A
23
Q
A
24
Q
A
25
Q
A
Use the coordinates for the the two side angles, they form two 30-60-90 triangles with the 3, 4, 5 triplet. Two sides = 5, then use the distance formula for the third side.
