Step-by-step explanation:
A=1/4√5(5+2√5)a²
The answer I got was a+2b
9514 1404 393
Answer:
72°
Step-by-step explanation:
The external angle E is half the difference of subtended arcs CG and DF.
E = (CG -DF)/2
2E = CG -DF . . . . . . multiply by 2
DF = CG -2E = 160° -2(44°) . . . . . add DF-2E to both sides; substitute values
arc DF = 72°
Gary because 10 to 15 rounds down to 2/3 which is greater than 3 to 5
