Because the 2 shorter sides are 6 and 8 in, and it is an right triangle, this is automatically a Pythagorean Triple. This is a 6-8-10 triangle, thus, the hypotenuse is 10 in.
Elsewise, you can find the answer using the plain Pythagorean Theroem:
62 + 82 = x2
36 + 64 = x2
100 = x2
10 = x
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Yes
The sides of a triangle add up to the perimeter.
-- Measure or calculate the length of each of its 3 sides. -- Add the lengths of its 3 sides. -- The sum is the perimeter of the triangle.
Unless it is a right isosceles triangle, a normal right triangle has no pairs of equal sides.
An equilateral triangle has three equal sides. The angles of an equilateral triangle measure 60 degrees each, but the sides can be any length.