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Let us assume you have a circle drawn with the center identified. Then draw one straight line through the center. Measure the length of the line bound by the intercepts of the straight line with the circumference of the circle. The line segment is the diameter.
Another case would be that you have a circle drawn with no center marked. Draw one straight line through the circle. Use a compass to draw the perpendicular bisector of the line segment bound by the intercepts of the straight line with the circumference of the circle toward the inner circle (the center of a circle cannot lie outside the circle!). Repeat drawing another (different) straight line through the circle and finish with a perpendicular bisector. The two bisectors will intercept at the center of the circle. Then you can proceed the same way as described in the first paragraph above.
Hint to draw a perpendicular bisector of a line segment: take one end of the compass, pivot the point at one end of the line segment and mark an arc with the other end on both sides of the line. Move the compass and pivot one point at the other end of the line segment. Mark an arc with the other end on both sides of the line. If the procedure is done correctly, the two arcs, one from each end, should intercept on one side of the line. There is another intercept of the two arcs on the side of the line. Connect the two arc-intercepts with a straight line. Convince yourself that the line bisects the straight line at a right angle. This last line is the perpendicular bisector of the original line (The first and last lines form the perpendicular bisector of one another).
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What is the radius of a circle that has a diameter of 12ft?
The radius of a circle is half the diameter → radius = ½ × 12 ft = 6 ft.
How do you determine the length of a circle?
The length of the radius of a circle is measured by a straight line from the centre to the edge. The length of the diameter of a circle is measured by a straight line from one side, through the centre, to the other side. The length of the circumference is calculated by multiplying the diameter by the constant pi... which is usually approximated to 3.1416.
How do you measure perimeter?
The perimeter is the sum of the lengths of the sides if the shapes has straight sides. They can be measured with a ruler.The perimeter of a circle can be calculated as diameter x pi where pi is 3.1416 the diameter can be measured.The perimeter of an irregular shape can only be measured by a rotating wheel.
How far will a 20 inch wheel travel in one revolution?
20 inches measured where on the wheel? Radius? Diameter? Circumference? Width?
How do you convert from diameter to centimeter?
A diameter is a straight line passing from side to side through the center of a body or figure, especially a circle or sphere. It can be measured in centimeters, but it doesn't convert to them. Perhaps you meant decimeter. Divide centimeters by 10 to get decimeters.
How is the diameter of a pizza measured in metric measurements?
The diameter is measured using a tape measure.
Are pipes measured by the diameter or circumference?
Diameter.
What unit is hail measured in?
Hail is typically measured in terms of its diameter. The sizes of hailstones can range from a few millimeters to several inches in diameter.
How is the diameter measured?
A diameter is measured by using a ruler. However, you also could use a digital caliper to measure the diameter of a circle.
What is the difference between tube and pipe?
Tube is measured by outside diameter, pipe is measured by inside diameter.
What is Cell diameter is measured in?
Cells are typically measured in micrometers
How is the diameter of a wire measured?
gauge
What is the diameter of a 30.2 diameter circle?
When carefully measured, it's found to be precisely 30.2 .
How do you measure Electrical wiring diameter in the United Kingdom?
Wire diameter is measured in millimetres (mm)
How do you measure a cork?
It is measured by length and diameter in millimeters. It is also "measured" by the quality of the cork itself.
What is bolt thread pitch and how is it measured?
Thread series cover designations of diameter/pitchcombinations that are measured by the number of threads per inch (TPI) applied to a single diameter
How are table saws measured?
Table saws are usually measured by the diameter of blade, -ie 10" or 12" .
