Question

3d figures practice assignment

which plane would be parallel to plane abc?

use for #1-4

• deb
• cfb
• abd
• def

Explanation:

🆕 New Concept Discovered: Parallel Planes in 3D Solids
Opposite flat faces that never cross

Step 1: Identify the 3D shape

The given figure is a triangular prism. It has two parallel triangular bases on opposite ends and three rectangular lateral faces connecting them.

Step 2: Locate plane ABC

Plane \( \text{ABC} \) represents the top triangular base of the prism, defined by the vertices \( \text{A} \), \( \text{B} \), and \( \text{C} \).

Step 3: Find the parallel plane

In a triangular prism, the two triangular bases are parallel to each other.

• The top base is plane \( \text{ABC} \).
• The bottom base directly opposite to it is plane \( \text{DEF} \).

Therefore, plane \( \text{DEF} \) is parallel to plane \( \text{ABC} \).

Answer:

DEF