Given: ad diameter of circle p. if m < 1= 30, then m ab=a) 15b) 30c) 60

The measure of an arc is the size of the corresponding central angle, so angle 1 for AB,

B

Option B

Step-by-step explanation:

we know that

The measure of arc AB is equal to the measure of angle 1 by central angle

so

-----> by central angle

we have

therefore

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

the answer to your question is c.)   volcanoes built the mountains and earthquakes tore them down.

step-by-step explanation: