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vivek

· started a discussion

· 1 Months ago

prob (Question: 187475.0 )

sir show atleast how they become equvalent triangle
or congurrent . not a right way to analyze the fig of tiangle

Question:
A straight line parallel to the base BC of the triangle ABC intersects AB and AC at the points D and E respectively. If the area of the ∆ABE be 49 sq. cm, then the area of the ∆ACD is –
Options:
A) 18 sq cm
B) 36 sq cm
C) 49 sq cm
D) 72 sq cm
Solution:

Ans: (C)



Knowledge Expert

· commented

· 1 Months ago

@vivek Proportionality Theorem (Thales theorem): If a line is drawn parallel to one side of a triangle intersecting other two sides, then it divides the two sides in the same ratio.

In ∆ABC , if DE || BC and intersects AB in D and AC in E then
AD AE
---- = ------
DB EC

vivek

· commented

· 1 Months ago

what is thel's theorm explain it

Knowledge Expert

· commented

· 1 Months ago

Apply Thel's Theorem
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