Use area model to solve 154 x 276 show your work

you can use a^2+ b^2=c^2

so mark-up is 0.4 multiplied by 180 = 72

dont't really have enough info here but its likely

sss for the three sides being congruent ( its stands for side side side)

or

sas   for side angle side.   so a side is congruent and and angle and a side