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10. Area
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Q8 of 83 Page 367

Show that the median of a triangle divides it into two triangles of equal area.


Consider the Figure


Here,


In ΔABC, AD is the median
Hence BD = DC
Draw AE
⊥ BC
Area of ΔABD = Area of ΔADC
Thus median of a triangle divides it into two triangles of equal area.


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6

Let ABCD be a ‖ gm in which DL ⊥ AB and BM ⊥ AD such that AD = 6 cm, BM = 10 and DL = 8 cm. Find AB.

7

Find the area of the trapezium whose parallel sides are 14 cm and 10 cm and whose height is 6 cm.

9

Prove that area of a triangle = X base X altitude.

10

In the adjoining figure, ABCD is a quadrilateral in which diagonal BD = 14cm. If AL ⊥ BD and CM ⊥ BD such that AL = 8 cm and CM = 6 cm, find the area of quad. ABCD.

Questions · 83
10. Area
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