The radius is the distance from the center point of the circle to any point on its circumference, it is denoted by and it equals half the diameter.
The radius is the distance from the center point of the circle to any point on its circumference, it is denoted by and it equals half the diameter.
The diameter is a straight line that passes through the center point of the circle and connects points on the circumference. The diameter equals twice the radius.
Pi is a constant number that represents the ratio between a circle's circumference and its diameter.
Its symbol is and it is always equal to .
A perpendicular is a straight line that extends from the center of the circle to any chord in the circle, divides the chord into equal parts, creates right angles with the chord, and bisects the arc corresponding to the chord.
- center of the circle
- radius of the circle
- diameter of the circle
Blue line - chord
Orange line - perpendicular
True or false:
The radius of a circle is the chord.
There are only 4 radii in a circle.
A radius is a straight line that connects the center of the circle with a point on the circle itself.
Therefore, the answer is incorrect, as there are infinite radii.
Answer:
False
M is the center of the circle.
Perhaps
CD is a diameter, since it passes through the center of the circle, meaning it is the longest segment in the circle.
AB does not pass through the center of the circle and is not a diameter, therefore it is necessarily shorter.
Therefore:
Answer:
No
Which figure shows the radius of a circle?
It is a straight line connecting the center of the circle to a point located on the circle itself.
Therefore, the diagram that fits the definition is c.
In diagram a, the line does not pass through the center, and in diagram b, it is a diameter.
Answer:
Which diagram shows a circle with a point marked in the circle and not on the circle?
The interpretation of "in a circle" is inside the circle.
In diagrams (a) and (d) the point is on the circle, while in diagram (c) the point is outside of the circle.
Answer:
If the radius of a circle is 5 cm, then the length of the diameter is 10 cm.
To determine if the statement "If the radius of a circle is 5 cm, then the length of the diameter is 10 cm" is true, we need to use the relationship between the radius and diameter of a circle.
The diameter of a circle is calculated using the formula:
where is the radius. In this problem, the radius is given as 5 cm.
Using the formula, the diameter is:
This matches exactly the length of the diameter given in the problem.
Therefore, the statement "If the radius of a circle is 5 cm, then the length of the diameter is 10 cm" is True.
Answer:
True