Each of the four angles of a rectangle is a right angle.

Show that each angle of a rectangle is a right angle.

Each of the angles of a square is a right angle and each of the four sides is of the same length.

Say True or False :(a) Each angle of a rectangle is a right angle.(b) The opposite sides of a rectangle are equal in length.(c) The diagonals of a square are perpendicular to one another.(d) All the sides of a rhombus are of equal length.(e) All the sides of a parallelogram are of equal length.(f) The opposite sides of a trapezium are parallel.

Find the measures of each of the two equal angles of an isosceles right-angled triangle.

Prove that the bisectors of the interior angles of a rectangle form a square.

If one of the four angles formed by two intersecting lines is a right angle, then show that each of the four angles is a right angle.

Prove that the quadrilateral formed by the bisectors of the angles of a parallelogram is a rectangle.

Prove that the quadrilateral formed by the bisectors of the angles of a parallelogram is a rectangle.

Determine the measure of each of the equal angles of a right-angled isosceles triangle.

The bisectors of base angles of a triangle cannot enclose a right angle in any case.