1. In the figure below, two radii OA and OB form an angle of 70° for two
concentric circles with 8 cm and 5 cm radii. Calculate the area of the shaded
region formed by the radii and concentric circles
![1 In The Figure Below Two Radii OA And OB Form An Angle Of 70 For Twoconcentric Circles With 8 Cm And 5 Cm Radii Calculate The Area Of The Shadedregion Formed B class=](https://ph-static.z-dn.net/files/d09/87d0769a8e82391c8c99f20bc526d200.jpg)