Please help ive been trying at this stupid question for 45 minutes now.

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Mary works for a company that ships packages and must measure the size of each box that needs to be shipped. mary measures a box and finds the length is 7 inches, the width is 14 inches, and the height is 15 inches. what is the volume of the box? [type your answer as a number.]

Which of these triangle pairs can be mapped to each other using two reflections?