pls answer my question
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it's given that DA=DB=DC..
so angles1 and 4 are equal
and angles 2 and 3 are equal
now.. angles..1+2+3+4=180
or. 4+3+3+4 =180
2× angle 3 +2×angle4=180
so angle3+angle4 = 90
as angle3+angle4 = angleACB
so ACB=90
hope uh understood it well
so angles1 and 4 are equal
and angles 2 and 3 are equal
now.. angles..1+2+3+4=180
or. 4+3+3+4 =180
2× angle 3 +2×angle4=180
so angle3+angle4 = 90
as angle3+angle4 = angleACB
so ACB=90
hope uh understood it well
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