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1.the perimeter of sector of a circle whose central angle is 90 and radius is 7cm is

2.a thin wire is in the shape of circle of radius 77cm.is bent into a square the side of square is

3.angle in major segment is

4.sum of angles in pentagon is

5. if A is an acute angle of ABC triangle right angled at B then value of sinA+cosA is

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by safura

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