Geometry True or False Questions?

True

To know whether it is a right triangle or not, you pretty much just do the reverse of the Pythagorean theorem.
You need to find if the hypotenuse is <, >, or = to the sum of the legs
if the hypotenuse (c) is:
= right triangle
> obtuse triangle
< acute triangle

a^2 + b^2 ____ c^2
20^2 + 21^2 ____ 29^2
400 + 441 _____ 841
841 ______ 841
841 = 841

since the hypotenuse = the sum of the legs, it is a right triangle

The reply is 'actual'. Quite a couple of men and women have mentioned that it might even be equilateral, however this does not give up it from being isosceles, it simply makes it a precise style of isosceles triangle.

It is true

True

True. It conforms to the Pythagorean Theorem.