The triangle on the left is a 45-45-90 right triangle....the hypotenuse = 7√2
So....leg "a" = hypotenuse / √2 = [ 7√2] / √2 = 7
The triangle on the left is a 30-60-90 right triangle.....side "c" is opposite the 60° angle and is √3 times the side "a"
So.... c = 7√3
