Lets first draw two diagonals represented by lines MO and AN inside the given quadrilateral AMNO
Now we know if lines are parallel then the alternate interior angles are congruent , hence
∠NMO≅∠AOM
∠MNA≅∠NAO
∠AMO≅∠NOM
∠MAN≅∠ANO
Also by Reflexive Property we have
NA≅NA
MO≅MO
From ASA congruence property of triangles that states that if two angles and a side of two triangles are congruent then the two triangle are said to be congruent, hence we have
Easy way to do this is draw the point on graph paper and count the same units above/below the x-axis. This example you are 7 units above the x-axis so you would count 7 units below the x-axis giving you the point.