Answer:
about 6.9
Step-by-step explanation:
first we have to find the missing side that doesn't have a "?". we can do this using pythagorean theorem. using the equation a^2 + 1^2 = 5^2 we know that this side is about 4.8. using this, we can use 4.8^2 + 5^2 = c^2. then, after doing this, we get about 6.9.
