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Home > MC2 > Chapter 7 > Lesson 7.1.4 > Problem 7-40

7-40.

Find the missing measure(s) of each circle. Homework Help ✎

a. diameter = ?
circumference = ?

b. diameter = ?
radius = ?

Remember:
Circumference = 2 · π · r
Diameter = 2 · r

Use these given formulas to solve for the missing information by substituting in given measurements and solving.

Circumference = 24π = 78.4 cm

Radius = 30 cm