Question

I need step by step explanation pls...

Answer 1

Answer:

$here \: the \: equation \: is \: as \: \\ x + 10 {}^{o} + x + x + 20 {}^{o} = 180 {}^{o} \\ 3x + 30 {}^{o} = 180 {}^{o} \\ x = \frac{1}{3} (180 {}^{o} - 30 {}^{o} ) \\ \: \: \: = 50 {}^{o}$

Answer 2

Step-by-step explanation:

actually this is a theorem which comes in lines and angles

hope it helps you

plz mark as brainliest answer