Answer:
Yes
Explanation:
You want to know if side lengths 73 in, 55 in, and 4 ft form a right triangle.
Pythagorean theorem
The triangle will be a right triangle if the side lengths satisfy the Pythagorean relationship. The side length 4 feet is equivalent to 48 inches.
48² +55² = 73²
2304 +3025 = 5329 . . . . . true
Tina's sign is a right triangle.
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