12. In ABC, D and E are the mid points of sides of AC and BC. If AB = 8.2 cm, find the
length of DE.
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1
Answer:
As D and E are the mid points of side AB and AC respectively
so by Mid point theorem
The line segment connecting the midpoints of two sides of a triangle is parallel to the third side and is congruent to one half of the third side.
DE=1/2BC
DE=8.2/2
DE=4.1cm
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2
AB =1/2DE [ by mid point theorem]
We can write that
DB = 1/2 AB
DB = 1/2 × 8.2
DB = 4.1 cm
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