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Exercise-11.3
Q1. Find the volume of the right circular cone with (i) radius 6 cm, height 7 cm(ii) radius 3.5 cm, height 12 cm ...
Exercise-11.2
Q1. Find the surface area of a sphere of radius: (i) 10.5 cm (ii) 5.6 cm (iii) 14 cm ...
Exercise-11.1
Q1. Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area. ...
SURFACE AREAS AND VOLUMES-True/False
Sharpen your understanding of three-dimensional geometry with this curated set of 25 True/False questions based on NCERT Class 9 Mathematics Chapter 11, "Surface Areas and Volumes." Each statement tes...
SURFACE AREAS AND VOLUMES-MCQs
Surface Areas and Volumes introduces Class IX learners to the real-world application of geometry through the study of 3D shapes, their surface areas, and volumes. Students explore cubes, cuboids, cyli...
SURFACE AREAS AND VOLUMES-Notes
Surface Area of a Right Circular Cone Right circular cone A right circular cone is a three-dimensional solid with: ...
Exercise-10.1
Q1. A traffic signal board, indicating ‘SCHOOL AHEAD’, is an equilateral triangle with side ‘a’. Find the area of the signal board, using Heron’s formula. If its perimeter is ...
HERON’S FORMULA-True/False
Are you ready to evaluate your understanding of Heron’s Formula from NCERT Class 9 Mathematics Chapter 10? This comprehensive set of 25 true/false questions helps students solidify their grasp on th...
HERON’S FORMULA-MCQs
Mastering Heron’s Formula is essential for every Class 9 learner, especially when solving problems based on triangles with known side lengths. This chapter not only strengthens conceptual understand...
HERON’S FORMULA-Notes
Heron (10 C.E. – 75 C.E.) Heron’s Formula Heron’s Formula is a special me...
Exercise-9.3
Q1. In Fig. 9.23, A,B and C are three points on a circle with centre O such that \(\angle BOC = 30°\) and \(\angle AOB = 60°\). If D is a point on the circle other than the a...
Exercise-9.2
Q1. Two circles of radii 5 cm and 3 cm intersect at two points and the distance between their centres is 4 cm. Find the length of the common chord. ...