Respuesta :

Answer:

50

Step-by-step explanation:

The values of a triangle have to equal 180. Subtract 180 by the two angles.

180-52=128

128-78=50

So M is 80 degrees.

-hope it helps

It’s 50!

So everything adds up to 180.
You do 78+52 = 130
180-130!
And 50!!
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