Maths-
General
Easy
Question
In the following figure the value of a b, respectively ...................
- 70°,65°
- 50°,75°
- 45°,60°
- 60°,75°
The correct answer is: 60°,75°
3x+4x+5x = 180
12x =180 (supplementary angles )
x=180/12
x=15 degree
Also 4x+3x+b=180 (supplementary angles)
7x+b =180
b=180-7*15
b=180-105
b=75
And also ,
3x+b+a=180 (supplementary angles)
15*3+75+a=180
120+a=180
a=60
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