No you had it right, it is around the 18 / 3 and the 5 + 1
Your octagon has a central angle of 360 deg. Since you're speaking of an octagon, which implies that the octagon is made up of eight triangles, divide 360 deg by 8 to obtain the measure of each minor arc formed.
Answer:
144
Step-by-step explanation:
5(9)=45
v=bh
v=(45)(3.2)
v=144
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