Study Online and Download Notes of Math Class 9 Unit 17: Practical Geometry - Triangles. In this unit we shall learn to construct different triangles, rectangles, squares etc.

Study Online and Download Notes of

**Math Class 9 Unit 17: Practical Geometry - Triangles**. After studying this unit, the students will be able to:

- Construct a triangle having given: two sides and the included angle, one side and two of the angles, two of its sides and the angle opposite to one of them and two of them angles, two of its sides and the angle opposite to one of them (with all the three possibilities).
- Draw: angle bisectors, altitudes, perpendicular bisectors, medians, of a given triangle and verify their concurrency.
- Construct a triangle equal in area to a given quadrilateral. Construct a rectangle equal in area to a given triangle. Construct a square equal in area to a given rectangle. Construct a triangle of equivalent area on a base of given length.

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What is includes in Unit 17: Practical Geometry - Triangles

In this unit we shall learn to construct different triangles, rectangles, squares etc. The knowledge of these basic constructions is very useful in every day life, especially in the occupations of woodworking, graphic art and metal trade etc. Intermixing of geometrical figures is used to create artistic look. The geometrical constructions are usually made with the help of a pair of compasses, set squares, dividers and a straight edge.

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