Question

Please help me with the attached problems, and please give an explanation on how you found the answers! Thanks :)

Answer 1

any answers yet?????

Answer 2

yeah sorry, also here is a reference
http://en.wikipedia.org/wiki/Circle#Theorems

For #20: multiply the 2 segments of each chord, then set them equal
6*x = 3*4
6x = 12
x = 2

Do #23 the same way

For #21: multiply outer segment by total length of each secant, then set equal
5*13 = 8*(x+8)
65 = 8x +64
1 = 8x
x = 1/8

Do #22 same way, except since "x" is tangent, the outer and total length are same
x*x = 2*14.5

Answer 3

So on number 23 i do the same thing as on number 20?
And BTW thank you sooo much!