This involves another of the secant rules for circles. When chords divide each other, the product of the segment lengths of one chord is equal to the product of segment lengths of the other chord.
18·6 = 9·YB
18·6/9 = YB = 12
The answer is 120 for sure, I believe
Distribute and simplify.
2(x+8)+6x
2x+16+6x
8x+16
8(x+2)
The formula for finding the height of an octagon from only one side is h=s(1 + the square root of 2). S is the length of one side. Your formula would be h=18(1 + the square root of 2).
h=18+18(the square root of 2)
h=18 + 25.4558
h=43.4558
Hope this helps!! :) And the decimal is rounded, just so you know ;). If your teacher likes everything in simplest radical form, then just don't convert the 18*the square root of 2 into a decimal and solve as you normally would.
