 # Graph a Circle on the TI 84 Plus CE Calculator

how to graph a circle on a ti-84 plus This is a topic that many people are looking for. cfiva.org is a channel providing useful information about learning, life, digital marketing and online courses …. it will help you have an overview and solid multi-faceted knowledge . Today, cfiva.org would like to introduce to you Graph a Circle on the TI 84 Plus CE Calculator. Following along are instructions in the video below:
This is rob i am going to show you how to graph a circle on on the ti 84. Plus. Ce graphing calculator to graph a circle on the ti plus ce.
We are going to use the conics app. That is built into the calculator to open the conics app press the apps button here the applications list opens up go down to number 4 conics and press enter the types of conics that you can graph with the conics app are circles. Ellipses hyperbolas and parabolas go down to number 1 circle and press.
The enter key now we see two standard equations for a circle. The first equation is referred to as the standard form and is also referred to as the center radius form the second equation is known as the general form equation for a circle. The general form is basicly the first equation multiplied out in this video.
We will use the first equation. And we will graph the following circle. X.
Minus.

3. Squared. Plus y.
Plus. 4. Squared.
Equals. 25. On the calculator choose one and press.
Enter. This screen appears to graph the circle. We will need to know h k.
And r.

The numbers below are from a previous circle. Equation. That i was graphing using our equation h.
Equals 3 k. Equals a negative. 4 and r squared equals.
25. Now lets plug in these numbers into the calculator h. Equals.
3. I already have a 3. There now use the down arrow key and go to k and enter a negative.
4 for k remember to use this negative sign here and not the minus sign but rob why use a negative four it looks like a positive.

4 well the equations is y minus a negative. 4 and a negative times a negative is a positive that is why in the equation. It is y plus 4.
Go down to r now r. Squared. Equals.
25. Thus take the square root of both sides and r equals a. Plus or minus 5 enter a positive 5 for r now press this graph button here to graph the circle unfortunately the numbers of the graph are not labeled.
But you can press this trace button here and then use the right or left arrow buttons to trace around the circle. The calculator will display the coordinates of the trace on the bottom of the screen to escape out of the trace press. The clear button.
Here remember the center of a circle.