Download NCERT Solutions For Class 10 Maths Chapter 12 Exercise 12.3 – Area related to Circles. This Exercise contains 16 questions, for which detailed answers have been provided in this note. In case you are looking at studying the remaining Exercise for Class 10 for Maths NCERT solutions for other Chapters, you can click the link at the end of this Note.
1. Find the area of the shaded region in the given figure, if PQ = 24 cm, PR = 7 cm and O is the centre of the circle.
Using Pythagoras theorem in △PQR (Angle of semi-circle is right angle)
QR2 = PQ2 + PR2
QR2 = 242 + 72 = 576 + 49 = 625 = 252
QR = 25 cm