Find the value of a,b,c
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A= b = c =
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Answer:
a = 20°
b = 130°
c =50°
Step-by-step explanation:
NOTE :
- Sum of all the angles of triangle = 180°
- sum of angles on the straight line = 180°
- In the given question there arethree triangles.
- ADC, ABD and ABC
In triangle ADC
Angle DAC + angle ACD + angle ADC = 180
=> 60 + 70 + c = 180
=> 130 + c = 180
=> c = 180 - 130 = 50°
Line BDC
Angle BDA + angle ADC = 180
=> b + 50 = 180
=> b = 180 - 50 = 130°
In triangle ABD
Angle ABD + angle BAD + angle ADB = 180
=> a + 30 + b = 180
=> a + 30 + 130 = 180
=> a + 160 = 180
=> a = 180 - 160 = 20°
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