The diameter of a circle is 30 meters. What is the radius? Geometry 1 Answer rihanna d. Jun 2, 2017 15m Explanation: The reason being is that radii (#2 * radius#) are equal to the diameter of a circle. Therefore, if the diameter is equal to 30m, then the two radii equals 30m. However, you want the radius, so half of 30m (#30/2#) is 15m. Answer link Related questions How do I determine the molecular shape of a molecule? What is the lewis structure for co2? What is the lewis structure for hcn? How is vsepr used to classify molecules? What are the units used for the ideal gas law? How does Charle's law relate to breathing? What is the ideal gas law constant? How do you calculate the ideal gas law constant? How do you find density in the ideal gas law? Does ideal gas law apply to liquids? Impact of this question 12352 views around the world You can reuse this answer Creative Commons License