Question

Which is a right triangle formed using a diagonal through the interior of the cube?

Answer 1

The answer is in fact, A. or "ABE"

Answer 2

Draw the given answers to determine the correct solution.

ΔABE is correct because it is a right triangle through a diagonal
ΔABD is incorrect because it does not go through diagonals.
ΔADH is incorrect because it does not go through diagonals.
ΔACE is incorrect because it does not go through the interior of the cube.

Answer: ΔABE