Ihave a test tomorrow & i need to know these, i don't understand how to do it very well

I'm 'just going to explain the bottom right square problem. Well, we know that 6 and 7 make a right angle, and 7 is 66 degrees. That implies that m<6 is 24 degrees. Now, since 3 is the opposite of 6 and 7 together, 3 is also a right angle, which is 90 degrees. We also know that m<2 is 32 degrees. We know that m<2+m<1 equals 90, so m<1 = 58 degrees. For the opposite side 4 and 5, 5 is 32 degrees while 4 is 58 degrees.

So the answers are:

m<1 =58

m<2=32

m<3=90

m<4=58

m<5=32

m<6=24

m<7=66

72 is the answer to this problem

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