The small triangle containing both the 6 and the ten should have its third side calculated. Use a^2 + b^2 = c^2 a = 6 c = 10 6^2 + b^2 = 10^2 36 + b^2 = 100 b^2 = 100 - 36 b^2 = 64 b = 8 Note: - 8 has not meaning.
Now by similar triangles using the small triangle and the middle sized triangle on your right
6/8 = 8/(x - 6) Reduce 6/8. You don't have to but it makes things easier. 3/4 = 8/(x - 6) Cross multiply 3(x - 6) = 4*8 Remove the brackets. 3x - 18 = 32 Add 18 to both sides 3x = 50 Divide by 3 x = 50/3 = 16.667 <<<=== answer
