Answer:
A= πr^2
45=πr^2
45/1 =22/7×r^2
45/1=22r^2/7 cross multiply
22r^2 ×1=45×7
22r^2=315 divide both sides by 22
22r^2/22=315/22
r^2=14.318
45 maybe
Step-by-step explanation:
it is a right angle . just divide by 2
1. your kinda doing the same thing
2. solving problems is somewhat like math
3. you solve problems in math
