How will you describe the position of a table lamp on your study table to another person?

## Section Formula NCERT Solutions Chapter 7 Exercise 7.3 Question 3

**Section Formula CBSE NCERT Solutions Chapter 7 Exercise 7.3 Question 3**

**3.** Find the area of the triangle formed by joining the mid-points of the sides of the triangle whose vertices are **(0, -1), (2, 1) and (0, 3)**. Find the ratio of this area to the area of the given triangle.

## Section Formula NCERT Solutions Chapter 7 Exercise 7.3 Question 2

**Section Formula CBSE NCERT Solutions Chapter 7 Exercise 7.3 Question 2**

**2. In each of the following find the value of 'k', for which the points are collinear.**

**(i) (7, -2), (5, 1), (3, k) (ii) (8, 1), (k, -4), (2, -5)**

## Section Formula NCERT Solutions Chapter 7 Exercise 7.3 Question 1

**Section Formula CBSE NCERT Solutions Chapter 7 Exercise 7.3 Question 1**

**1. **Find the area of the triangle whose vertices are:

**(i) (2, 3), (-1, 0), (2, -4) (ii) (-5, -1), (3, -5), (5, 2)**

## How to find area of triangle given three vertices?

We can find Area of triangle using formula ** base height** if we know the length of base and height of triangle.

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