Answer:
A. DEF where and .
Step-by-step explanation:
At first we must keep in mind that two triangles are similar when they have same angle configuration, that is, each pair of angles is congruent. If ABC and DEF, then and . Hence, and .
In a nutshell, correct answer is A.
u= -3
Step-by-step explanation:Solve for
u by simplifying both sides of the equation, then isolating the variable.
It would be 60.