Two sides are 3x longer than the shortest side. So, set up your problem like this. X = unknown length in centimeters 3X = length of two longer sides 1X = length of short side 3x + 3x + 1x = 49 7x = 49 x = 7 So, two longer sides are 21 centimeters each and the short side is 7 centimeters. 21+21+7 = 49
The side opposite the 30° angle is half the size of the hypotenuse. So, 84/2=42. Now, the side opposite the 60° angle is shown as 84/2 · , which is the same as 42√3.