I'm Up and Down, and Round and Round
Exercise 5.1
Circle
4 questions
Class 9 · Maths
NCERT
Q1
Draw ΔABC with AB = 5 cm, ∠A = 70° and ∠B = 60°. Draw the circumcircle of ΔABC. Is the centre inside or outside the triangle?
Q2
Draw ΔABC with AB = 5 cm, ∠A = 100°, AC = 4 cm. Draw the circumcircle of ΔABC. Is the centre inside or outside the triangle?
Q3
Draw ΔABC, with AB = 6 cm, BC = 7 cm and CA = 7 cm. Draw
the circumcircle of ΔABC. Let the circumcentre be O. Measure OA, OB, OC.
Q4
What is the least possible radius of a circle through two points A and B?