# Drag away from the origin and left-click a second time to define Leg 1 of the triangle.
# Drag away from leg 1, left-click a third time to define Leg 2 and complete the triangle.
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NOTES, SPECIAL CASES OR EXCEPTIONS: '''Side 1''' establish the length of first leg of the triangle. '''Side 2''' establishes the length of the second leg of the triangle '''Angle''' defines the opening angle of the origin vertex (the angle between leg one and leg two). Hold down the {{key|Shift}} key while positioning the third point of the triangle to constrain the origin angle to 15º increments.
CONSTRAIN ANGLE DRAWING TO 15º INCREMENTS
Hold down the SHIFT key while positioning the third point of the triangle to constrain the origin angle to 15º increments (option "B" in the diagram below).