Respuesta :

Hey there!

A triangle has a total of 180°

Add the two lengths you know that the triangle already has . . .

53 + 77 = 130

Subtract 180 and 130 . . .

180 - 130 = 50 ←

Answer: 50

The value of x = 50°

Hope this helps you,
Have a wonderful day! :)
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