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torisob [31]
2 years ago
15

Help help /ayuda ayudaaa༎ຶ‿༎ຶ!!!!!!!!!!!!

Mathematics
1 answer:
guapka [62]2 years ago
5 0

Answer:

Step-by-step explanation:

Use Pythagorean theorem

Base² + altitude² = hypotenuse²

Base² + 7² = 20²

Base² + 49 = 400

Base² = 400 - 49 = 351

Base = √351 = 18.73 = 18.7 mm

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