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 (that means multiplying them by themselves), then add those two numbers together, we will get the square of the longest side. So, 3 squared is 9, and 4 squared is 16. When we add 9 and 16, 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 and 4 squared is 16. When we add 9 and 16, we get 25. The square root of 25 is 5, which is the length of the hypotenuse!