What perimeter are possible for a shape drawn along graph paper lines

In the triangles, bc =de and ac fe.if the mzc is greater than the mze, then ab isdfelth

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?

Maria found the least common multiple of 6 and 15. her work is shown below. multiples of 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, . . multiples of 15: 15, 30, 45, 60, . . the least common multiple is 60. what is maria's error?