CBSE Class 9 Answered
the exterior angles obtained on producing the base of a triangle both ways are 100° and 120°. find all the angles
Asked by raghavgargrg28 | 10 Sep, 2021, 05:11: PM

Figure shows ΔABC whose sides AB and AC are extended .
If exterior
B =100o , then interior
B = ( 180 -100 ) = 80o


If exterior
C =120o , then interior
C = ( 180 -120 ) = 60o


Then
A = ( 180 - 80 - 60 ) = 40o

Hence angles of ΔABC ,
A = 40o ,
B = 80o ,
C = 60o



Answered by Thiyagarajan K | 16 Sep, 2021, 02:58: PM
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