Question

in the adjoining figure ABCD is a trapezuim in which AB!!DC IF L A =55 DEGREE AND L B=70 DEGREE FIND L C L D

Answer 1

angle A+ angle D= 180° [if a transversal cuts two parrallel lines, then the sum of angles along the same side of transversal is 180°]

angle B+ angle C= 180° [if a transversal cuts two parrallel lines, then the sum of angles along the same side of transversal is 180°]

Hence, angle C= 180- 70 = 110°
angle D= 180- 55 = 125°

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