Explanation:
Hey there!!
Just do it in a simple way.
Use the properties of parallel lines, and find the value of x to find angke 1.
angle 1= angle 2 { alternate angles on parallel lines are equal }
![2x + 20°= 3x + 10°](https://img.qammunity.org/2021/formulas/mathematics/high-school/k0p0d3i7mqlqzbsr1tba4l8tuo9x20g47z.png)
or, 3x-2x = 20°-10°
x= 10°.
now,
angle 1= 2x+ 20°
=2×10°+20°
Therefore, the measure os angle 1 is 40°.
Hope it helps...