In this q. I took semicircle's area and added a the triangle's area and subtracted the sector's area but the ans. In wrong in this way . Why?:
14. AB and CD are respectively arcs of two concentric circles of raddii 21 cm and 7 cm and centre O (see Fig. 12.32). If AOB=30o, find the area of the shaded region.
15. In fig. 12.33, ABC is a quadrant of a circle of radius 14 cm and a semicircle is drawn with BC as diameter. Find the area of the shaded region.
Kindly refer the same link for your query 15
https://www.meritnation.com/ask-answer/question/in-the-given-figure-abc-is-a-quadrant-of-a-circle-of-radius/areas-related-to-circles/6294565
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https://www.meritnation.com/ask-answer/question/in-the-given-figure-abc-is-a-quadrant-of-a-circle-of-radius/areas-related-to-circles/6294565
For remaining queries we request you to post them in separate threads to have rapid assistance from our experts.
Regards
