Respuesta :

Mistystar4881
First problem (number 9):

KBM is 30º and KBT is 90º. Together that is 120º. 
Subtract 120º from 180º to get the measure of MBE: 60º. 
MBE is the same as NBT, so that means 180 - 60 is EBN.
EBN is 60º. The answer is B.

Second problem (number 10):

We're going to use the same process as before. 50 plus 90 is 140. 
180 minus 140 is 40. 
HLA is the same as ELR.
ELR is 40, and 180 - 40 = 140. 
ALR is 140º. The answer is A. 

Hope this helps!

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