I will assume the sail is shaped like a triangle- actually a right triangle.
like: |\
82.5 | \ 90.3
........|__\
..........B where B is the length along the boom.
If this is true, then you can use a2 + b2 = c2 to solve the problem
82.52 + B2 = 90.32
B2 = 90.32 - 82.52
B = square root of (90.32 - 82.52)
B = square root of (8154.09 - 6806.25)
B = square root of (1347.84)
B = 36.712940497868050776203213584964
B would be about 36.7 feet (if you use significant figures)
Fundus- Rounded, upper part of the uterus.
The Iris
the anterior end of Paramecium is rounded.
The diameter of Mimas is 396 km (246 mi). Making it is the twentieth-largest moon in the Solar System and the smallest known astronomical body that is rounded in shape due to self-gravitation.
672.04 K rounded more
7.07107 (rounded)
6.928 (rounded)
10,924.6 (rounded)
7.0711 (rounded)
-- A rectangle has no 'formula'. -- The length of the diagonal is 24feet 10.62inches (rounded)
152feet 3.79inches (rounded)
8.485 cm (rounded)
15.8114 metres (rounded)
Fundus- Rounded, upper part of the uterus.
35.384 ft (rounded)
A rectangle doesn't have a 'hypotenuse'. The diagonal of that one is 64.031 . (rounded)
25.6125 (rounded)