Ellen's teacher wants her to draw a triangle. She starts by drawing a line 10 centimeters long and two angles, 40° and 70°. What will the third angle measure?
A) 40°
B) 50°
C) 60°
D) 70°
please explain!!!

Respuesta :

the total must be 180
40 + 70 + X = 180
the third one is = D.70

Answer:

d.70

Step-by-step explanation: