Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to determine a right triangle [title] Align a protractor on one side of a triangle. [title] Measure the angle by relating to an adjacent segment. [title] Check the measurement to see if it is 90º.

Ending1: [title] Point the protractor at a hexagonal point to the east or west nearest the triangle, when left-pointing, is the default point. [step] ( a ) [substeps] Fx = 17-39. Ending2: [step] If it is 90º, it is a right triangle. Remember that you just need one right angle to have right triangle. Ending3: [title] Align another segment of the same angle on one side. [title] Mark the angle about 1/15º. Ending4: [step] This divides a triangle into two segments with a 90 degree angle. The angle is calculated based on a number of degrees taken between the two segments.

Answer format: ending1/ending2/ending3/ending4