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In a Triangle, ABC, the internal bisector AD of ∠A meets the side BC at D. If BD = 2.5 cm., AB = 5 cm. and AC = 4.2 cm., then find DC.
(a)2.1 cm.
(b)6.3 cm.
(c)1.2 cm.
(d)1.8 cm

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Important Questions on Geometrical Shapes
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In the given diagram, point R and Q are on PS. ÐPQT = x°, ÐRQT = (x – 50)° and ÐTUR = (x + 25°). find the value of ÐURS.

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is the ratio of the length and perimeter of a rectangle. What would be the ratio of its length and breadth?

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If the interior angle of a regularpolygon is , then it is a-
1. Octagon
2. Hexagon
3. Pentagon
4. Tetragon

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The two circles with radii and centred at the point and respectively. A transverse common tangent to the both circles cuts line Joining and at the point such that . Calculate the length (in cm.) of .

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Read the given question and decide which of the following information is sufficient to answer the question.
What is the value of 0?
Information :
(II) 0 < q < 90°

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