एक वृत्त का क्षेत्रफल 121π सेमी2 दिया गया है। वृत्त की परिधि क्या है?

In which type of triangle does the circumcenter (intersection point of perpendicular bisectors of the sides) lie outside the triangle?

If the angles of a quadrilateral LMNP are in the ratio 4 : 5 : 7 : 8, what type of quadrilateral is LMNP?

From the given sets of side lengths, which ones can form a valid triangle? (a) 2.1 cm, 4 cm, 1.9 cm (b) 5.7 cm, 3.2 cm, 2.4 cm (c) 1.1 cm, 0.7 cm, 0.5 cm (d) 3.6 cm, 4.8 cm, 6 cm

Find the radius of the circle in which a central angle of 30° intercepts an arc of length 32 cm. (Use π ≈ 3.1416)

What is the primary meaning of the term 'gradient' in mathematics?