The first one is correct, just match the numbers with the corresponding sides of each triangle
L and M are parallel, just like P and N because their angles with other segments are the same
You need to give more info
Answer: Yes it is.
Step-by-step explanation: So we are already told that segment AC is congruent to segment DC. They both have a right angle, as indicated by the angle symbol, and they share side-length BC.
According to the Hypotenuse-Leg Theorem, two right triangles that have a congruent hypotenuse and a corresponding, congruent leg are congruent triangles. AC and DC are hypotenuses and they are congruent. And BC, the shared side, is a corresponding congruent leg. And since they are both right triangles, we then know that the HL Theorem applies.
4.7 because if you plug it in- (2,1) and (6,6) it is 4.7 units