Question

What is the perimeter of a cross section perpendicular to face QRST of the cube shown below? R S 4 N 0 4 T M 4. P

Answer 1

the cross-section perpendicular to face QRST is NRSO

the side of face NRSO is NR, a = 4

so, the perimeter is 4 x a = 4 x 4 = 16 m

thus, the perimeter is 16 m