What is the value of a in the formula, a² + b2 = c?

the length of a leg

Step-by-step explanation:

I think you mean the Pythagorean theorem a^2 + b^2 = c^2?

If so, it is describing the relation of a right triangle.

a and b are the legs(doesn't matter which is which) and c is the hypotenuse

take a look at this if you have more questions

https://www.britannica.com/science/Pythagorean-theorem

hope it helps

90.00

Step-by-step explanation:

10 x 9 = 90.