Question

in a quadrilateral abcd , andle d is equal to 150°and angle a is equal to angle b and angle c .Find angle a , b, c .
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Answer 1

let the angle b,c,d be x,x,x                         [as the three angles are equal]

now angle sum property of quadrilateral= 360 degreegiven;

angle A=150 degree

therefore,angle A+angleB+angle C+angle D=360 degree

150+3x=360 degree3x=210x=

70hence,angles are 150,70,70 and 70 degrees

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