What an expression which combines variables numbers at least one operation

I'm confused on this could anyone me and show me what i need to do to solve it.

Fast! find the length of cu. the triangles are similar. show your work.

Does the construction demonstrate how to copy an angle correctly using technology a) yes the distance between points a and f was used to create circle h b) yes the distance between points f and g was used to create circle h c) no the distance between points a and f was used to create circle h d) no the distance between points f and g was used to create circle h