Fill in the blanks.
(i) Sum of interior angles of a polygon of n __P__ sides is right angles.
(ii) The measure of at least one __Q__ angle of a concave quadrilateral is more than 180°.
(iii) A quadrilateral which has only one pair of equal opposite angles is __R__.
(iv) Sum of all exterior angles of a polygon of n sides is __S__.
| P | Q | R | S | |
| A | 4 | exterior | kite | n × 360° |
| B | n – 2 | exterior | trapezium | n × 180° |
| C | 2n – 4 | interior | trapezium | 360° |
| D | 2 | interior | trapezium | 180° |
Please explain me the (i) question and how it's answer obtained