Find the surface area of a cylinder with a height of 9 ft and a base radius of 3 ft.
1 answer:
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Two planes intersect in a line that contain all common points of these two planes.
1. Plane named ABFE contains points A, B, F and E.
2. Plane named BFCD contains points B, F, C and D.
As you can see points B and F are common points for these two planes, then the line of intersection is BF and its notation is
Note that notation stays for segments and notation
stays for rays.
Answer: correct choice is A.