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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

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

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1);Perimeter;of;sector= heta imes r\* Where,;theta =central;angle;of ;sector;of;circle;in;radians\*Perimeter;for;central;angle;of;90^circ=fracpi2 imes r=pi imes frac12 imes 7;cm=11;cm\* 2);length;of;wire=perimeter;of;circle=2 imespi imes77=484;cm\* perimeter;of;square=4 imes side=484;cm\*side=121;cm\* 3);Angle;in;major;segment;is;always;a;acute;angle\* 4);Angle;made;by;a;side;of;regular;pentagon;at;the;center=frac3605=72^circ\* Sum;of;the;two;equal;base;angles;at;the;side= 180-72=108^circ\*Hence,;Internal;angle;at;one;vertex=108^circ \*Sum;of;all;5;internal;angles;of;pentagon=540^circ\*

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Deependra Verma

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