Question

Item: Circle D has a radius of 16 inches and right central angle, _EDF. Find the exact length of EF.

Answer 1

Formula:
C= 2 r π
Step 1: plug the given radius into the formula
C= 2(16) π
Step 2: multiply them and you should get
C= 32 π

Step 3: then you will want to divide the circumference by 4

360/90 =4
32 π /4 = 8 π

Answer: 8 π inches