# Find the length of a chord which subtends an angle 90 at the centre whose...

Question 28
A

$$8\sqrt{2} cm$$

B

$$8\sqrt{3} cm$$

C

4 cm

D

8 cm

##### Explanation

Length of chord = $$2r \sin (\frac{\theta}{2})$$

= $$2 \times 8 \times \sin (\frac{90}{2})$$

= $$16 \times \frac{\sqrt{2}}{2}$$

= $$8\sqrt{2} cm$$

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