Question

Mr. and Mrs. Jones have a patio that they want to rearrange. They want to put flower pots in the largest corner of their patio, but they do not know which corner of their patio has the largest angle. Mr. and Mrs. Jones only have the measurements of the sides of the patio area. The diagram is a sketch Mrs. Jones drew of the patio. Find which corner of the patio has the largest angle.
Please help me