Respuesta :

btsBlackpinckfan123

Answer:

19

Step-by-step explanation:

TheUnknownScientist

Answer:

The answer is 2.5r

Step-by-step explanation:

Given;

  • A circle with 215°

To Find;

  • CD = ?

Now,

We know that, In a circle the sum of all the is equal to 360°

Here, let COD be x

So,

x + 215 = 360

x + 215 – 215 = 360 – 215

x = 145

Now,

CD = 2πr × (θ/360)

CD = 2(3.14) r × (145/360)

CD = 6.28r × 0.4

CD = 2.5r

Thus, The measure of CD is 2.5r

-TheUnknownScientist 72