Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
In the diagram below of circle C, QR is a diameter, and Q(1, 8) and C(3.5 , 2) are points on a coordinate plane. Find and state the coordinates of point R.
 one year ago
 one year ago
In the diagram below of circle C, QR is a diameter, and Q(1, 8) and C(3.5 , 2) are points on a coordinate plane. Find and state the coordinates of point R.
 one year ago
 one year ago

This Question is Closed

xRAWRRx3Best ResponseYou've already chosen the best response.0
dw:1339302689432:dw
 one year ago

CalcmathleteBest ResponseYou've already chosen the best response.1
Use the midpoint formula, but work back wards. (3.5, 2) = (x_1 + x_2/2, y_1 + y_2/2) (7, 4) = (1 + x_2, 8 + y_2) (6, 4) = (x_2, y_2) Therefore, (6, 4)
 one year ago

aceaceBest ResponseYou've already chosen the best response.0
(x3.5)^2 + (y2)^2 = 6.5^2
 one year ago

xRAWRRx3Best ResponseYou've already chosen the best response.0
wait, I'm still confused about how to get it...
 one year ago

CalcmathleteBest ResponseYou've already chosen the best response.1
What are you confused on?
 one year ago

aceaceBest ResponseYou've already chosen the best response.0
(x the x co ordinate of c)^2 + (y the y co ordinate of C) ^2 = the radius squared
 one year ago

CalcmathleteBest ResponseYou've already chosen the best response.1
Point C is the midpoint and therefore you can work backwards using the midpoint formula.
 one year ago

CalcmathleteBest ResponseYou've already chosen the best response.1
@aceace I think you misread the question...
 one year ago

xRAWRRx3Best ResponseYou've already chosen the best response.0
how do I work backwords though?
 one year ago

aceaceBest ResponseYou've already chosen the best response.0
soory if i mis read the question
 one year ago

CalcmathleteBest ResponseYou've already chosen the best response.1
3.5 = (1 + x)/2 7 = 1 + x x = 6 The x coordinate of R is 6. Then work with y. 2 = (8 + y)/2 4 = 8 + y y = 4 Therefore, the ycoordinate of R is 4. R(6, 4)
 one year ago

CalcmathleteBest ResponseYou've already chosen the best response.1
Just focus on one of the values. FOr instance, what I did up there is start with x and then y.
 one year ago

CalcmathleteBest ResponseYou've already chosen the best response.1
Do you get it?\[M(x, y) = ((x_{1} + x_{2})/2, (y_{1} + y_{2})/2)\]
 one year ago

xRAWRRx3Best ResponseYou've already chosen the best response.0
OHHH. Oh I'm sorry, I was really confused from when you meant backwards but I get it now LOL thank you SO much x)
 one year ago

CalcmathleteBest ResponseYou've already chosen the best response.1
lol. Alright. You're welcome :)
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.