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Q1. Three angles of a quadrilateral are 70o, 95o, and 80o, . The fourth angle is 

(a) 95o

(b) 105o

(c) 115o

(d) 85o

Q2. A diagonals of a rectangle is inclined to one side of a reantangle at 25o. The acute angle between the diagonals is 

Q3. Diagonals AC and BD of a parallelogram intersect at O. If angle BOC = 90o and angle BDC = 90o , then angle DAB = 60o and angle DBC - 80o, then angle CDB is 

Q4. ABCD is a rhombus such that angle ACB = 40o . Then angle ABD is 

Q5. If the diagonals of a quadrilateral bisect each other, then the quadrilateral must be 

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