Question 1109369
If the perimeter of rectangle CSAM is 56cm, AM=30cm cannot be true.
If AM=30cm, the perimeter of rectangle CSAM cannot be 56cm.
{{{drawing(300,200,-1,29,-1,19,
rectangle(0,0,28,18),rectangle(0,0,1,1),
rectangle(28,0,27,1),rectangle(0,18,1,17),
locate(-0.2,19,S),locate(28,19,C),
locate(-0.2,0,A),locate(28,0,M)
)}}} In a rectangle CSAM CS=AM and MC=SA,
so, perimeter=CS+SA+AM+MC=AM+SA+AM+SA=2AM+2SA .