8th grade math! Alternate Exterior & Interior, Help would be appreciated!<3

Which of the following is a justification used while proving the similarity of triangles lom and mon

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.

The length of a rectangle plus its width is 25 cm. the area is 156 square cm. what are the length and width of the rectangle? separate the answers with a comma.