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A circle is inscribed in the triangle AB...

A circle is inscribed in the triangle ABC whose sides are given as AB = 10, BC = 8, CA = 12 units as shown in the figure. The value of AD × BF is:
त्रिभुज ABC में एक वृत्त अंकित किया हुआ है जिसके किनारे AB = 10, BC = 8, CA = 12 इकाई के रूप में दिए गए हैं जैसा कि चित्र में दिखाया गया है। AD x BF का मान है:

A

18 units

B

21 units

C

16 units

D

15 units

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