Question

please answer 9 questions

Answer 1

Radius of larger circle, R = 7 cm
Radius of smaller circle, r = 7/2 cm
Height of ΔBCA = OC = 7 cm
Base of ΔBCA = AB = 14 cm
Area of ΔBCA = 1/2 × AB × OC = 1/2 × 7 × 14 = 49 cm2 
Area of larger circle = πR2 = 22/7 × 72 = 154 cm2 

Area of larger semicircle = 154/2 cm2 = 77 cm2 

Area of smaller circle = πr2 = 22/7 × 7/2 × 7/2 = 77/2 cm2

Area of the shaded region = Area of larger circle - Area of triangle - Area of larger semicircle + Area                                               of smaller circle

Area of the shaded region = (154 - 49 - 77 + 77/2) cm2

                                                        = 133/2 cm2 = 66.5 cm2 

Answer 2

HEYA User,

Sorry for the Mistakes but I hope You'll get your answer...