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**Chapter 8 Worksheet 1 | Basic Geometrical Concepts** **| Class-6 DAV Secondary Mathematics**

**Unit 8 Worksheet 1 || ****Basic Geometrical Concepts**

**Basic Geometrical Concepts**

**1. Mark a point in your notebook and draw a line passing through it. How many lines can you draw passing through this point? **

**2. Mark any two points in your notebook and draw a line passing through both the points. How many such lines can you draw passing through these two given points?**

**3. Classify the following pairs of lines as parallel lines or intersecting lines.**

**4. Fill in the following blanks. **

**(a) An orange has a _______ surface. **

**(b) A 100 rupee note has a _______ surface. **

**(c) _______ lines can pass through one given point in a plane. **

**(d) Three or more points in a plane which lie on the same line are called **________.

**(e) Lines in a plane which do not meet anywhere are called ________ lines. **

**(f) Two lines which cut each other at a point are called ________ lines.**

**5. In the given figure. write—**

**(a) all the pairs of parallel lines. **

**(b) the lines whose point of intersection is E. **

**(c) one set of four collinear points. **

**(d) any four pans of intersecting lines. **

**(e) the point of intersection of lines m and t. **

**(f) the point of intersection of lines r and t. **

**6. A, B, C are any three points In a plane. Join them in pairs. How many lines can you get if—**

**(a) A. B. C are collinear? **

**(b) A, B, C are not collinear? **

**7. Lines I, m and n are concurrent. Also lines r. I and m are concurrent. Draw a figure and state whether floes r, I, m and n are concurrent or not. **

**8. In the given figure, name—**

**(a) the lines concurrent at point A. **

**(b) all the sets of collinear points. **

**(C) the lines concurrent at point G. **

**(d) the point of intersection of three lines I, p and m. **

**(e) all the points that lie in this plane. **

**(f) two pairs of intersecting lines. **

**9. In the figure given below, name the—**

**(a) lines concurrent at D and B. **

**(b) point of concurrence of lines AD, AB and AC.**

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