The triangle formed is an acute-angled triangle. In every acute-angled triangle, the circumcentre lies inside the triangle. Therefore, the centre of the circumcircle is located inside the triangle.
Draw ΔABC with AB = 5 cm, ∠A = 70° and ∠B = 60°. Draw the circumcircle of ΔABC. Is the centre inside or outside the triangle?
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The constructed triangle is an acute-angled triangle. In such triangles, the perpendicular bisectors of all three sides intersect at a point inside the triangle. This point is called the circumcentre. A circle drawn with this point as the centre passes through all three vertices of the triangle. Hence, the circumcentre of the circumcircle lies inside the triangle.
For more NCERT Solutions for Class 9 Maths Ganita Manjari Chapter 5 I’m Up and Down and Round and Round (2026-27):
https://www.tiwariacademy.com/ncert-solutions/class-9/maths/ganita-manjari-chapter-5/