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SAI International School
                                                      CLASS-VII

               Mathematics
               CHAPTER- 11: Area and Perimeter
               Home Assignment-3




               1) Find the area of each of the following triangle:

               (a)











               2) ΔABC is right angled at A (Fig 11.25). AD is perpendicular to BC. If AB = 5 cm, BC
               = 13 cm and AC = 12 cm, Find the area of ΔABC. Also find the length of AD.












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               3)  Area of triangle PQR is 100 cm  (Fig. 9.20). If altitude QT is 10 cm, then find its
               base PR.















               4) ΔABC is isosceles with AB = AC = 7.5 cm and BC = 9 cm (Fig 11.26). The height
               AD from A to BC, is 6 cm. Find the area of ΔABC. What will be the height from C to
               AB i.e., CE?
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