Pls answer me the 3rd one I'll mark you as Brainliest.
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Step-by-step explanation:
following vertically opposite angles,
the angle adjacent to 90 degree angle will be a
as it is on a straight line,
a+2a+90=180 linear pair
3a+90=180
3a=90
a=30
so 2a will be 60
Answered by
1
Answer:
a= 30, 2a= 60
Step-by-step explanation:
we know that the angle of a straight line is 90°
so if 1 side is 90° the next side would be also 90°[180°-90°=90]
a = angle between 2a and 90 ° because it is vertically opposite
a+2a= 90°
3a= 90°
a= 30°
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