A circle is subdivided by a central angle of 90 degrees. The length of the subtended arc is 25 mm. What is the radius of the circle?

A:
B:
C:
D:

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Step-by-step explanation:

This the arc is 90 degrees and there are 360 degrees in a circle, it makes up of the circle. Therefore, its length will be of the circumference. Since its length is 25 mm, the circumference is then . The circumference of a circle is given by , where is the radius of the circle. Therefore, we can set up the following equation and solve for :

Solving, we get:

.

sss (side, side, side)

sas (side, angle, side)

asa (angle, side, angle)

aas (angle, angle, side)

hl (hypotenuse, leg)

mk./km: lm

step-by-step explanation:

,mlmlm

; mk

lk