Which of the following ratios in a circle is equal to pi?

a. circumference to radius

b. radius to circumference

c. diameter to circumference

d. circumference to diameter

Option D

Step-by-step explanation:

By definition we know that the circumference of a circle is:

Where the radius of the circle is r.

And the diameter of a circle is twice the radius:

Where the radius of the circle is r.

The ratio can be written as:

or  

Rewriting the ratio of circumference to diameter and simplitying, you get:

Therefore, the ratio in a circle that  is equal to π is: Circumference to diameter.

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

first one is a: renaming a fraction. second one is c: de-c

step-by-step explanation:

my explanation is that these were the answers on edg : )