Question

FAST (will give brainilyist)
solve for A

Answer 1

a = 4
`√(5)`

Explanation:

pythagorean theorem:

a² + 8² = 12²

a² + 64 = 144

a² = 80

a =
`√(80)`

a =
`√(4)`·
`√(4)`·
`√(5)` which simplifies to be 4
`√(5)`