Answer variants:
If a ray stands on a line, then the sum of two adjacent angles so formed is \(90^\circ\).
The sum of the angles of a triangle is \(90^\circ\).
If a transversal intersects two lines such that a pair of corresponding angles are equal, then the two lines are parallel to each other.
If the transversal intersects two parallel lines, then each of the corresponding angles are equal.
The sum of the angles of a triangle is \(180^\circ\).
Place the right statements in the boxes given below.
Statement \(1\):
Statement \(2\):
Statement \(3\):