Rational Numbers

4 Topics | 3 Quizzes
Linear Equations in One Variable

6 Topics | 3 Quizzes
Understanding Quadrilaterals

5 Topics | 3 Quizzes
Visualising Solid Shapes

3 Topics | 1 Quiz
Data Handling

5 Topics | 3 Quizzes
Squares and Square Roots

4 Topics | 3 Quizzes
Cubes and Cube Roots

3 Topics | 3 Quizzes
Comparing Quantities

6 Topics | 2 Quizzes
Algebraic Expressions and Identities

10 Topics | 3 Quizzes
Mensuration

8 Topics | 3 Quizzes
Exponents and Powers

4 Topics | 3 Quizzes
Direct and Inverse Proportions

3 Topics | 3 Quizzes
Factorisation

4 Topics | 3 Quizzes
Playing with Numbers

3 Topics | 3 Quizzes
To find the area of any quadrilateral we can divide it into two triangles and then the area can be easily calculated by calculating the area of both the triangles separately.

Area of quadrilateral

Where h_{1 }and h_{2} are the height of both the triangles and d is the length of common diagonal i.e.AC.

**Example**

Find the area of quadrilateral ABCD.

**Solution:**

In the quadrilateral ABCD,

BD is the common diagonal so .

Height of the two triangles are and .

Area of quadrilateral ABCD

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