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Triss [41]
3 years ago
11

Given: AB tangent at D, AD = OD = 4 Find: Area of the shaded region

Mathematics
1 answer:
belka [17]3 years ago
6 0
<span>AB tangent at D, AD = OD = 4
so triangle OAD is right angle with side of 4 and 4.
area of OAD = 1/2 * 4 * 4 = 8

Angle AOD = DAO = 45 deg.
so circular sector OCD area = area of circle O * 45/360
= pi * 4 * 4 * 45/360
= 2pi

Shade area ACD = trigangle OAD - circular sector OCD
= 8 - 2pi
= 1.72




</span>
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