Question on triangles

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Incognito
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Q1. In the triangle ABC, E and D are points on AB while F is a point on AC. It is known that BC = BD, ED = DC, EC = EA and DF is perpendicular to AC. If FC = 3 cm and angle B is 20 degree, what is the length of DC?

a. 3 sqrt3
b. 6 cm
c. 2 sqrt3
d. None of these

Q2. In triangle PQR, G is the centriod as well as the circumcenter. A, B and C are points on the sides PQ, QR and RP respectively such that PA : AQ = QB : BR = RC : CP = 2 : 1. The area of the triangle PQR is how many times that of the triangle ABC ?
a. 3
b. sqrt3
c. 3sqrt3
d. 9

jigar_er_civil's picture
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ans for Q-1 = 6 cm?

ans for

Q-1 = 6 cm?

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jigar_er_civil's picture
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ans for second question is 3

ans for second question is

3 times?

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Incognito
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the ans will be (3*3^1/2)/2

the ans will be (3*3^1/2)/2

Incognito
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6 for 1st

1)6
2)3 times

Incognito
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Q1.

The answer is 3 sqrt 2 to me.

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Q1 : ans

I m getting the ans as
DC = 3/ sin (15) .

correct me if i am wrong.

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Incognito
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q.1 ans

3sqrt3..

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Answer for first question

Is this 6 cm?

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nweru's picture
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how to calculate?

how to calculate?

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how to prepare for eu

how to prepare for english usage?

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