I need help this makes no sense

m 10 is : 123

m 15 is: 123

m 16 is : 57

Step-by-step explanation:

To get m 10: I subtracted 180-57 and got 123.

To get m 15: I did not need to do anything for that because m10 and m15 are the opposite of each other which means there angle measure is the same.

To get m 16: I did not need to do anything because m9 is the opposite of m 16 which makes their angle measure the same.

this might get deleted, sorry. it has to be an actual question. if you really wanted to give someone free points, ask a question like "why does the sky look blue, and the sun is yellow to our eyes? "

step-by-step explanation:

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180