I NEED THIS FINISH pls help someone ?

r=43

Step-by-step explanation:

put 2r+3 equal to 89 and solve

2r+3=89

subtract 3 from 89

then divide 2r from 86 and you get 43

step-by-step explanation: the answer for wha if rt is 10 centimeters long, and wha is st? it’s 6

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.