Answer:
37.5 cm
Step-by-step explanation:
See attached for reference.
let the diagonal be x,
By Pythagorean formula:
x² = (22.5)² + (30)²
x = √[(22.5)² + (30)²]
x = 37.5 cm
Answer: D
Step-by-step explanation:

Answer:
Step-by-step explanation:
(a). B, C and D are the distinct points that are collinear.
(b). FC and BD are the distinct lines that intersect each other at a point C.
(c). E, F, C and A are the points that are coplanar (on the same plane).
(d). Another name for plane X is plane AEF. (Since a plane is defined by the three distinct points on the same plane.