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**What we learned in previous classes.**

**Area and Perimeter of Rectangle; square and triangles**

**Area and Perimeter of all type of parallelogram and rhombus**

**Herons's formula**

**Find the area of a triangle whose sides are `13 cm; 14 cm and 15 cm.`**

**Find the area of the quadrilateral ABCD; in which AB = 7 cm; BC =6 cm;CD =12 cm; DA= 15 cm and AC =9 cm**

**Radha made a picture of an aeroplane with coloured paper as shown in figure. Find the total area of the paper used.**