Depends on triangle. First a triangle equals 180 degrees in total. If you have a square making 90 degrees,the other 2 sides have to add with 90 to make 180. So you add 90 with the number you have and then use the sum to subtract it from 180 making your missing side.
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The sum of interior angles of any triangle is 180 degrees. A right triangle is defined as a triangle having one angle that measures 90 degrees. Therefore, it follows that the sum of the remaining two angles will be 90 degrees 90-68=22 The third angle is 22 degrees
Surely you know how to find the third side of a right triangle, when you know the lengths of the other two. Find it, and then add up the lengths of the three sides to get the perimeter.
Yes it is. A normal, 3:4:5 triangle has a right angle, three different angles, and three different sides. There should be more for you to find.
The pythagorean theorem is the equation used to find the hypotenuse or missing side in a right triangle. It is named after Pythagoras of Samos, a mathematician who lived in the 5th and 6th centuries BC.
you add it all