Which is a prime number? 13 14 15 16

13

Step-by-step explanation:

13 is a prime number because it is only divisible by itself, 13, and 1. 13 = 13 * 1

14 is not because it is divisible by 2 and 7. 7*2 = 14

15 is not because it is divisible by 5 and 3. 5*3 = 15

And 16 is not because it is divisible by 4, 8, and 2. 4*4 = 16 and 8*2 = 16.

m∠3=180°. If she can get m∠2 and m∠3 to both equal the same expression, she can use the transitive property of equality to set them equal to each other.

How can Lily get m∠2 and m∠3 to both equal the same expression?

options:

A. She can measure m∠2 and m∠3 with a protractor.

B. She can subtract 180° from both sides of m∠1+m∠2=180° and m∠1+m∠3=180°.

C. She can subtract m∠1 from both sides of m∠1+m∠2=180° and m∠1+m∠3=180°.

D. She can subtract m∠1 from both sides of m∠1+m∠2=180°, and subtract m∠3 from both sides of m∠1+m∠3=180°.