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angle cab =45°(alternate opposite angles r equal)
angle acb+angle dca=180°(linear pair)
angle acb+105=180
angle acb=180-105=75°
angle abc+angle acb+angle cab=180°(angle sum property of a triangle)
abc+75+45=180
abc+120=180
abc=180-120
=60°
hope it helps you
thank you
angle acb+angle dca=180°(linear pair)
angle acb+105=180
angle acb=180-105=75°
angle abc+angle acb+angle cab=180°(angle sum property of a triangle)
abc+75+45=180
abc+120=180
abc=180-120
=60°
hope it helps you
thank you
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