Question

algebra helpp@@@

Answer 1

know that the pythagorean theorem holds true for right triangles, which is:
c^2 = a^2 + b^2 and we know what c is and b so solve for a

Answer 2

substitute the values for c and b in and then solve for a

Answer 3

jtug6 this stuff its so difficult for me

Answer 4

\[a^2+√77^2=12^2\]