Question

What is the length of AB?

a. square root of 53
b. 5
c. 2 square root of 10
d. 2 square root of 6

Answer 1

the diagonal of the bottom of the box is ✓6²+4² = ✓52 = 2✓13

now we know the bases of the triangle whose hypotenuse is the AB segment

(AB)² = ✓(2✓13)²+1². AB = ✓53 or answer A