Question

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. Release your mouse button when the item is place. If you change your mind, drag the item to the trashcan. Click the trashcan to clear all your answers.
Find the length of the hypotenuse of a right triangle whose legs are 8 and 15 units in length.

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Answer 1

Apply Pythagoras to find √(8*8+15*15) = 17.

Not sure how that maps to your answers.