INA ABC ,angle C = 3 angleB = 2 (angleA+angleB) Find all angles.
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A + B + C = 180
A + B + 3B = 180
A + 4B =180 ———(1)
GIVEN,
3B = 2(A+B)
3B = 2A + 2B
B = 2A
SUBSTITUTING THIS IN (1)
A + 4x2A = 180
9A = 180
A = 20
SUBSTITUTING THE VALUE OF ‘A’ IN (1)
4B = 180 - 20
B = 160/4
B = 40
GIVEN,
C = 3B
C = 3x40
C = 120
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A + B + 3B = 180
A + 4B =180 ———(1)
GIVEN,
3B = 2(A+B)
3B = 2A + 2B
B = 2A
SUBSTITUTING THIS IN (1)
A + 4x2A = 180
9A = 180
A = 20
SUBSTITUTING THE VALUE OF ‘A’ IN (1)
4B = 180 - 20
B = 160/4
B = 40
GIVEN,
C = 3B
C = 3x40
C = 120
plz mark me as brainliest...
muvasreetham22:
Plz mark me as brainliest...
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