How does the figure help verify the triangle inequality theorem? 15 OA. by showing that a triangle cannot be formed when the sum of the lengths of two sides equals the length of the third B. by showing that a triangle cannot be formed when the sum of the lengths of two sides is less than the length of the third OC. by showing that only one triangle can be formed when the sum of the lengths of two sides is less than the length of the t OD. by showing that only one triangle can be formed when the sum of the lengths of two sides equals the length of the third