Question

Q is the point of intersection of the diagonals of one face of a cube with edges 2 units. The length (in units) of QR is _____.

Answer 1

@aum

Answer 2

QR^2 = RS^2 + SQ^2; RS = 2

SQ = 1/2 SP
SP^2 = 2^2 + 2^2

Answer 3

8

Answer 4

why sp^2=2^2 + 2^2?

Answer 5

SP is the diagonal of a square with sides 2 and 2. Apply Pythagoras Theorem.

Answer 6

only =2^2