Find m
(look at the picture)

Step-by-step explanation:

since you are learning about similar triangles... i'd guess that some where of the picture.. there is some words that say,  that the two smaller triangles are the same, similar , congruent.. so that we can just add up angles 1 + 2 or

13 + 13 = 26 °

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5