ankaburt
contestada

One of the same side angles of two parallel lines is 20° smaller than the other one. Find all angles. Please explain this problem, I don't under stand it.

Respuesta :

bcalle
When you have parallel lines same side interior angles add up to 180 degrees.
Let the first SSI (same side interior) angle be x, and the other SSI be (x - 20).
Therefore, x + (x - 20) = 180
2x - 20 = 180
add 20  to both side
2x = 200
divide both sides by 2
x = 100
x - 20 =  100 - 20 = 80

Answer:

80

Step-by-step explanation:

Otras preguntas