Question

what is an equation of circle O shown in the graph below?
(x-2)^2+(y+4)^2=4
(x-2)^2+(y+4)^2=16
(x+2)^2+(y-4)^2=4
(x+2)^2+(y-4)^2=16

Answer 1

the equation of circle is (x-a)^2+(y-b)^2=R^2
R is the radius of circle

Answer 2

a

Answer 3

a is the x-coordinate of center and b is the y-coordinate of center.

Answer 4

in the diagram below of right triangle ABC an altitude is drwan to hypotenuse line AB
which proportion would always represent a correct relationship of the segments?
c/z=z/y
c/a=a/y
x/z=z/y
y/b=b/x

Answer 5

ACH~CHB

Answer 6

Why did you pick A for the first one???

Answer 7

The center is located at (-2, 4)........What is x-(-2)

Answer 8

Focus.

Answer 9

i don't know how to explain just need help o the second one

Answer 10

Probably a good start would be to identify the similarity between the sides. There are three sides that are hypotenuse. a, b, c are hypotenuse, which 2 are part of similar triangles, or are all of three triangles similar. A decision you will need to make.

Answer 11

@amirreza1870 has indicated a pair (ACH ~ CHB) although I believe CHB is confusing as defining a triangle. I am hoping they will return and clarify. I am assuming H is for the height (Z) in the diagram.