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What is Social Science?
Social Science is the systematic study of human society. It not only tells us what happened or where things are located, but also explains why events occur, how people live together, how environments influence life, how governments function, how economies operate, and how the past and present togethRead more
Social Science is the systematic study of human society. It not only tells us what happened or where things are located, but also explains why events occur, how people live together, how environments influence life, how governments function, how economies operate, and how the past and present together shape the world.
For detailed solutions, you can also refer to: https://www.tiwariacademy.com/ncert-solutions/class-9/social-science/chapter-1/
See lessDraw ΔABC with AB = 5 cm, ∠A = 70° and ∠B = 60°. Draw the circumcircle of ΔABC. Is the centre inside or outside the triangle?
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. HenRead more
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/
See lessDraw ΔABC with AB = 5 cm, ∠A = 100°, AC = 4 cm. Draw the circumcircle of ΔABC. Is the centre inside or outside the triangle?
The given construction forms an obtuse-angled triangle. In an obtuse-angled triangle, the perpendicular bisectors of the sides intersect at a point outside the triangle. This point is called the circumcentre. A circle drawn with this point as the centre passes through all three vertices of the trianRead more
The given construction forms an obtuse-angled triangle. In an obtuse-angled triangle, the perpendicular bisectors of the sides intersect at a point outside 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 lies outside 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/
See lessDraw 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.
The circumcentre is the point where the perpendicular bisectors of the triangle meet. It is equally distant from all three vertices. Therefore, the lengths of OA, OB and OC are equal. When measured with a ruler, the three distances should be the same. Any slight variation is usually caused by smallRead more
The circumcentre is the point where the perpendicular bisectors of the triangle meet. It is equally distant from all three vertices. Therefore, the lengths of OA, OB and OC are equal. When measured with a ruler, the three distances should be the same. Any slight variation is usually caused by small construction or measurement errors.
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/
See lessWhat is the least possible radius of a circle through two points A and B?
Infinitely many circles can pass through two given points. Among them, the smallest circle is formed when the two points become the endpoints of the diameter. In this case, the centre lies at the midpoint of the line segment joining the points. Therefore, the least possible radius is equal to half tRead more
Infinitely many circles can pass through two given points. Among them, the smallest circle is formed when the two points become the endpoints of the diameter. In this case, the centre lies at the midpoint of the line segment joining the points. Therefore, the least possible radius is equal to half the distance between the two given points.
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/
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