In the below parallogram find `/_I` and `/_G` by any other method? (hint: angle-sum property of a quadrilateral)

The sum of four angles of a quadrilateral is

Sum of the angles in a quadrilateral is ……….

Sum of opposite angles in a cyclic quadrilateral is …………

Given statements in (a) and (b). Identify the statements given below as contrapositive or converse of each other. (b) If a quadrilateral is a parallelogram, then its diagonals bisect each other. (i) If the diagonals of a quadrilateral do not bisect each other, then the quadrilateral is not a parallelogram. (ii) If the diagonals of a quadrilateral bisect each other, then it is a parallelogram.

In parallelogram RING if m angle R = 70^(@), find all the other angles.

The four angles of a quadrilateral is in the ratio of 1: 2:3:4. Find the measure of each angle of the quadrilateral.

The four angles of a quadrilateral are in the ratio 1: 2:3:4. Find the measure of each angle of the quadrilateral.

What would happen if the quadrilateral is not convex? Consider quadrilateral ABCD. Split it into two triangles and find the sum of the interior angles. What is the sum of interior angles of a concave quadrilateral?

In the figure a=60^@ find other angles.