Question

in Rhombus ABCD angle A is equal to Angle B - 30 then find angle C .
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Answer 1

angle A = Angle B - 30°..given

angle A and Angle B are adjacent angles

adjacent angles of a rhombus are supplementary

(B-30)+B=180... A=B-30

B+B=180+30

2B=210

B=105

Angle B and angle C are adjacent angles

adjacent angles of a rhombus are supplementary

Angle B + angle C is equal to 180 degree

angle b is equal to 105 degree

105+C=180

=75