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lockshernostaw
180 degrees in a triangle therefore you will subtract 54 and 79 from 180 which then gives you the answer --47--
do you understand how to do it now ?
trombonebookworm
The sum of the interior angles in any triangle is 180 degrees. Using this, we can set up an equation.
54+79+x=180
133+x=180
x=47

The unknown angle is 47 degrees. Hope this helped!