Answer:

Step-by-step explanation:
<u>Step 1: Add 30.45 to both sides</u>
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Answer: 
X²+y² =(Radius)²
x²+y² =10². So the radius is 10
Answer: you minus the equations you have to get the equation that you want so it all can add up to that *
Step-by-step explanation:
Answer:
d=90°
e=81°
f=99°
Step-by-step explanation:
To find f
180-81
=99