An indirect proof starts with the assumption that the statement we are tying to prove is not true.
m∠ M ≤ m ∠ N
An indirect proof starts with the assumption that the statement we are trying to prove is not true. In this case, the statement is that m ∠ M is greater than m ∠ N.
m∠ M > m ∠ N
The negation of this statement will give us the necessary assumption.
Assumption: m∠ M ≤ m ∠ N
