Anyone? i know it's an octagon but from there i'm stuck

Can someone me with this problem . show your work .

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

]supplementary angles are two angles that add up to . • complementary angles are two angles that add up to degrees. • adjacent angles share a and a • congruent angles have the measure. • an triangle has one angle that is greater than 90 degrees. • a triangle with angles 45°, 45°, and 90° would be a triangle