What is the definition of radius?
Radius, Diameter, Circumference

Flashcard
•
Mathematics
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The radius is the distance from the center of a circle to any point on its circumference.
2.
FLASHCARD QUESTION
Front
What is the definition of diameter?
Back
The diameter is the distance across a circle through its center, equal to twice the radius.
3.
FLASHCARD QUESTION
Front
What is the formula for calculating the circumference of a circle?
Back
Circumference = 2 × π × radius or Circumference = π × diameter.
4.
FLASHCARD QUESTION
Front
If the radius of a circle is 5 cm, what is the diameter?
Back
Diameter = 2 × radius = 2 × 5 cm = 10 cm.
5.
FLASHCARD QUESTION
Front
If the diameter of a circle is 12 cm, what is the radius?
Back
Radius = diameter ÷ 2 = 12 cm ÷ 2 = 6 cm.
6.
FLASHCARD QUESTION
Front
What is the circumference of a circle with a radius of 7 cm?
Back
Circumference = 2 × π × 7 cm ≈ 43.98 cm.
7.
FLASHCARD QUESTION
Front
True or False: A circle can have more than one radius.
Back
False. A circle has an infinite number of radii, but they all measure the same length.
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