Question

I feel like this should be easy but idk. This needs to be in order from greatest to least. I know that R is 63, but the options are
RS, ST, RT,
RT, ST, RS
RS, RT, ST
ST, RT, RS

i don’t understand why they are like “ST” instead of a single angle? I really need an explanation for this, i have a quiz tomorrow thank you

Answer 1

Answer:

RS,RT,ST

Step-by-step explanation:

63+60=123 , 63+57=120 ,60+57=117