Ineed the answer ! geometry is very hard

12.5

step-by-step explanation:

you have to make an assumption about the diagram. you have to assume that the angle formed by 10 and x is bisected. the diagram is very misleading.

if that is so, 2 ratios are formed: 10/8 and x/10

these ratios are equal. note: it is always a good idea to put the unknown amount in the numerator (top part of the fraction) in a proportion.

10/8 = x/10                 multiply both sides by 10

10*10/8 = x                 do the multiplication

100/8 = x                     do the division

12.5 = x

good luck on your studies! : )

david edward.