The second and third one are correct
Hypotenuse or C (x) can be found with the equation

After solving you get about 6.32
6.32 about the same as
Answer:
21.) 47/100
Step-by-step explanation:
Answer:
Congruent figures have the same proportions and have the exact dimensions as each other.
Similar figures have the same proportions but the dimensions are scaled.
If the figures don't satisfy either it is neither similar nor congruent.