The person appears to be a/an Southeast Asian Male, approximately 3 to 9 years old.
The longest side of the triangle is 5! We can find this using a special rule called the Pythagorean theorem. It tells us that if we take the lengths of the two shorter sides, which are 3 and 4, and square them (3 times 3 and 4 times 4), then add those two numbers together, we will get the square of the longest side. So, 3 squared is 9, 4 squared is 16, and when we add them, we get 25. The square root of 25 is 5, which is the length of the longest side!
The longest side of the triangle, called the hypotenuse, is 5 units long! We can find this using a special rule called the Pythagorean theorem. It tells us that if we take the lengths of the two shorter sides, which are 3 and 4, and square them (3 times 3 and 4 times 4), then add those two numbers together, we will get the square of the hypotenuse. So, 3 squared is 9, 4 squared is 16, and when we add them, we get 25. The square root of 25 is 5, which is the length of the hypotenuse!