Assuming that the isosceles triangle has a right angle (90 degree) since it has a hypotenuse of 8 the formula would be
a^2 + b^2=c^2
Where a and b represent the 2 equal sides and c represents the hypotenuse. Pythagorean Theorem.
"a" squared plus "b" squared = "c" squared
so if a and b are equal ( a=b) thus isosceles then you have
2 a^2 = c^2 (2 times "a" (side) squared = "c" (hypotenuse) squared)
or in your case since you said the hypotenuse was 8 inches
2 a^2 = 8^2 (2 times "a" squared = 8 squared) or
2 a^2=64
You would then divide both sides by 2 leaving
a^2=32 ("a" squared = 32)
Take the square root of both sides and the sides of your isosceles triangle are 5.66 inches
IMHO, the charts are much easier if you can find one that shows the hypotenuse or you know the finished size of the unit.
Last edited by Stitches23; 02-13-2021 at 07:48 AM.