CBSE Class 9 Answered
The exterior angles obtained on producing the base of a triangle both ways are 100° and 120° respectively. Find all the angles.
Asked by Topperlearning User | 05 Dec, 2013, 02:04: AM
Expert Answer
2 + 3 = 100o (exterior angle property)
1 + 100o = 180o (Linear pair)
1 = 80o
1 + 2 = 120o (exterior angle property)
80o + 2 = 120o
2 = 40o
1 + 2 + 3 = 180o (Angle sum property of 
)
80o + 40o + 3 = 180o
3 = 60o
Hence, 1 = 80o, 2= 40o, 3 = 60o
Answered by | 05 Dec, 2013, 04:04: AM
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