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A chord is a straight line joining two points on the circumference of a circle whereas a radius joins only one point on the circumference to the circle centre.
A diameter is a straight line joining two points on the circumference (via the circle's centre) and so is also a chord. (Yes, but the question is about a radius, not a diameter!)
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What does diamater mean?
The diameter is the chord (line that goes from the circle to the circle) that goes through the center of the circle. It is the largest chord. It is also equal to twice the radius.
A radius of a circle is perpendicular to a chord if and only if?
Bisects that chord
True or False If a radius of a circle intersects a chord it is perpendicular to that chord?
its false
If a radius of a circle is perpendicular to a chord then it bisects that chord?
YesAt a right angle
A chord of a circle has length 4.2 cm and is 8 cm from the center of the circle what is the radius of the circle?
To find the radius of the circle, we can use the Pythagorean theorem. The chord divides the circle into two equal parts, each forming a right triangle with the radius. The radius, the distance from the center to the chord, and half the length of the chord form a right triangle. Using the Pythagorean theorem, we have (radius)^2 = (distance from center)^2 + (1/2 * chord length)^2. Substituting in the given values, we get (radius)^2 = 8^2 - (1/2 * 4.2)^2. Solving for the radius gives us a radius of approximately 7.48 cm.
