Measuring Space: Perimeter and Area — Class 9 solved problems
4 problems from this chapter, each solved step by step.
- Find the area of a triangle whose sides are 13 cm, 14 cm and 15 cm, using Heron's formula.
The area of the triangle is 84 cm².
- Construct a triangle ABC with AB = 5 cm, BC = 6 cm and angle B = 60 degrees and find its area.
The area of the triangle ABC is 7.5√3 cm².
- Find the area of a triangular park ABC with sides 50m, 80m, and 120m using Heron's formula.
The area of the triangular park is approximately 1452.36 m².
- Find the volume of a right circular cone with base radius 6 cm and height 7 cm. Use pi = 22/7.
The volume of the right circular cone is 264 cm³.
More Class 9 chapters
- Orienting Yourself: The Use of Coordinates7 solved
- Introduction to Linear Polynomials1 solved
- The World of Numbers2 solved
- Exploring Algebraic Identities2 solved
- I'm Up and Down, and Round and Round1 solved
- The Mathematics of Maybe: Introduction to Probability7 solved
- Predicting What Comes Next: Exploring Sequences and Progressions1 solved