WILL GIVE BRAINLIEST! Two angles of a triangle measure 45° and 87°. Find the measure of the third angle, in degrees. (Enter an exact number.)
°

48

Step-by-step explanation:

All the angles of a triangle add up to 180

180-45-87=48

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to find the perimeter, you add up all the lengths of the sides. in this case you would have to add up 18+22+40+80 which equals 160.