The answer is SSS since both triangles have equal sides the third one has to be congruent since they share the same line
Circumference= 2πr
Circumference= perimeter
14.28km= 2(3.14)r
14.28= 6.2831853072r
divide both sides by 6.2831853072
2.27= r
ANSWER: The radius is 2.27km
Hope this helps! :)
115 would be your answer because 180-65=115
