You haven't provided neither the diagram nor the options. Therefore, I cannot provide an exact answer, however, I will try to help you with the concept.
<u>For a triangle, the measure of each angle is proportional to the length of its opposite side.</u> <u>This means that:</u> 1- The largest angle is the angle opposite to the longest side 2- The smallest angle is the angle opposite to the shortest side
Since you are looking for the largest angle, pick the one facing the longest side
<u>Some tips and tricks:</u> <u>1- In a right angle triangle</u>, we know that the hypotenuse is the longest side, therefore, the largest angle would be the right angle <u>2- In an obtuse triangle</u>, the largest angle is simply the obtuse angle itself (the one whose measure is greater than 90) <u>3- In equilateral triangle</u>, all three angles are equal