Mathematics
Assertion (A): In a regular polygon, sum of its interior angles : sum of its external angles is 3 : 1. The number of sides (n) in it is 8. Reason (R): (2n -4) x 90°/360° = 3/1 ⇒ 2n - 4/4 = 3 and n = 8 1. A is true, R is false. 2. A is false, R is true. 3. Both A and R are true. 4. Both A and R are false.
Related Questions
Assertion (A): In the given figure, ABCD is a rectangle and DCEF is a parallelogram then ABEF is a rectangle.
Reason (R):
AB = DC and DC = FE⇒ AB = FE and so ABEF is a rectangle.
- A is true, R is false.
- A is false, R is true.
- Both A and R are true.
- Both A and R are false.
Assertion (A): ABCD is a parallelogram. AX is bisector of ∠A, CY is bisector of ∠C. Then quadrilateral AXCY is also a parallelogram.
Reason (R): If any one pair of opposite sides of a quadrilateral are equal and parallel then the quadrilateral is a parallelogram.
- A is true, R is false.
- A is false, R is true.
- Both A and R are true.
- Both A and R are false.