how do you find the center of a circle?

Question

A circle with the circumfrance of 10.5". How do you find center?

Answer 1

1. Draw two chord lines across the circle at about 90 degrees from each other (placement does not need to be exact.. or even accurate...

2. Draw a bisecting and perpendicular line to each of the two lines you just drew... the perpendicular lines will meet at the center of the circle.

Answer 2

If this is a geometry construction problem where you are given a circle without the center point, do this.

Draw two arbitrary chords that each intersect the circle at two different points. It's best to not even try to make them diameters or anything close to that. Now construct the perpendicular bisectors of those two chords. They will intersect at the center of the circle.

This technique will work for any size circle.

Answer 3

On paper, draw a square around it which intercectects the circumference on all four sides and connect the opposite corners - the center is where the diagonal lines cross.

Mathmatically, C=Pi*D or 10.5"=3.1416*D
thus D=3.34" or R=1.67" and the center will be 1.67" from all points on the circle.

Answer 4

10.5" = 125 inches. 125 devided by 4 = 31.25. Start at any point and put a mark then measure 31 1/4 inches put a mark, then 62 1/2 inches put a mark, then 93 3/4 inches put a mark Now from zero mark streach a string to the 62 1/2" mark. then another line from 31 1/4" to 93 3/4" were strings intersect this is the middle.

Answer 5

First you use the formula C= 3.14(pi)x d. Then you plug in the values. 10.5 = pi x d. Divide pi on each side. The number then you get is approxamently 3.34. To find the center of the circle divide the diameter, 3.34" by 2, resulting in 1.67". Hope this helped.

Answer 6

a thank you to stipulate the suitable diameter utilising in basic terms a ruler and pencil? Mark a factor on the wheel and place the wheel on a sprint bit paper - ideally precise alongside the sting so which you would be able to rotate the wheel in a perfectly rapidly line. Rotate the wheel 360 tiers till the mark is touching the paper returned. degree the size of the two marks you have and you have have been given the circumference. The circumference equals 3.14 * D (or 2*pi*r no count if that's extra handy for you). Now which you have have been given have been given the suitable diameter of the wheel, positioned your 0mm mark of the ruler on one fringe of the ruler and pass the ruler around till the different fringe of the wheel aligns with precisely the same length you got here up with for diameter. would desire to take you all of two minutes.

Answer 7

Pick any three points on the circle such that you can form a triangle. Then draw two perpendicular bisectors of any two sides of the triangle. The intersection point of the two perpendicular lines is the center of the circle. The center is also called the circumcenter of the triangle.

Answer 8

It's amazing so far has been no answer.
First you find R (radius) from the formula 2*R*pi = circumference. In your case R = 1.67". Then use a compass and draw two arches with R from any two points of circumference. The intersection point is the center.

Answer 9

You draw the diametre (any line which crosses the circunference from any point to the opposite one) Then, you take the compass from one of those two points of the diametre which cut the circunference and draw an arch which cuts the circunference. With the same compass (and without changing the degrees of openness of it), you make the same from the other extreme of the diametre. The two archs cut at two points. Match them with a line. That line (the bisectric) cuts the diametre in a point that is exactly the center.

Answer 10

Half the diameter is equal to the radius. The radius always ends at the centre of the circle. The radius of this circle is 5.25