Respuesta :
The sum of the measures of the angles of a triangle is
180 degrees.
Let x = our unknown angle
A right angle has measure 90 degrees.
We have x + 90 + 40 = 180 so
x + 130 = 180 and x = 50
180 degrees.
Let x = our unknown angle
A right angle has measure 90 degrees.
We have x + 90 + 40 = 180 so
x + 130 = 180 and x = 50