Geometry

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In the given figure, if AD is the bisector of ∠CAE and AB =12 cm, AC = 8 cm, BC = 16 cm, then, CD = ?
 AED = ∠B, then find the value of x

26 cm
no
32 cm
yes
28 cm
no
34 cm
no
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There are three parallel straight lines. Two points A and B are marked on the first line, points C and D are marked on the second line, and points E and F are marked on the third line. Each of these 6 points can move to any position on its respective straight line. 
Consider the following statements:
1. The maximum number of triangles that can be drawn by joining these points is 18.
2. The minimum number of triangles that can be drawn by joining these points is zero.
Which of the statements given above is/are correct?
1 only
no
2 only
yes
Both 1 and 2
no
Neither 1 nor 2
no
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The angles of a pentagon are in the ratio 2: 3 : 4 : 5 : 6. What is the measure of the greatest exterior angle of the pentagon?
54°
no
162°
no
126°
yes
108°
no
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