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# 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 Expert Answer 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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