Question

guys question number 11 please please please please please please please please please please tell me by 9:30 pm ​

Answer 1

Answer:

angle ACB is 30°

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Answer 2

Answer:

angle ACB = 30°

first we make the construction

The joint AE such that it become parallel to BC

then ABCE is a parallelogram

then angle ACE = angle CAB ( alternate interior angles)

Angle ACE =ANGLE CAB =70°

WE ALSO KNOW THAT SUM OF ALL ANGLES OF TRIANGLE IS 180°

SO IN TRIANGLE ABC

ANGLE A+ANGLE B+ANGLES C= 180°

70°+80° +ANGLE C = 180°

ANGLE C= 180°-150°

ANGLE C= 30°

THUS ,ANGLE ACB=30°