Which of the following statements is INCORRECT with

Find out the circumference of a sector whose radius is 7 cm and it makes the angle of 45° at the centre?

Let two chords AB and AC of the larger circle touch the smaller circle having same centre at X and Y. Then XY = ?

If I is the incentre of ΔABC , if  ∠ BAC = 75⁰ , then what is the measure of  ∠ BIC?

In the given figure. ‘O' is the centre of the circle and ∠BCA = 50°. The value of ∠BDA is:

Find the difference between angle and its complement if the angle is three-seventh of its complement.

PQ and PR are the two chords of a circle. The tangents at Q and R meet at A. If ∠QPR = 64°, then the measure of ∠QAR is?

In a regular polygon, the ratio of the exterior angle to the interior angle is 4:5. Find the interior angle of the polygon.