Can someone please help me with the following problems

Determine if the triple numbers are can be sides of a right triangle?
sqrt(10)sqrt(13)sqrt(23)

The length of thy hypotenuse of a right triangle equals the length of one of legs of the triangle
A) always true
B) sometimes true
C) never true

Do the followig figures form semiregular tesselations?
Pentagon, hexagon 15-gon
A)yes
B)NO

1 answer

Is √23^2 = √10^2 + √13^2 ?

How can the hypotenuse , which is always the "longest" side be equal to one of the others ?