A Non-Convex Quadrilateral ABCD Tiles the Plane

question 12

Multiple Choice

A non-convex quadrilateral ABCD tiles the plane. What is a possible configuration of the angles at the vertices?
I: two types of vertices: 2 As and 2 Cs; 2 Bs and 2 Ds
II: one type of vertex: A, B, C, D

• A) I only
• B) II only
• C) both I and II
• D) neither I nor II

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Definitions:

Vulnerability

A state of being open to harm, damage, or attack due to susceptibility or lack of protection.

Persuasive Technique

Strategies used to convince or influence others to adopt a certain perspective, belief, or to undertake an action.

Receiver's Perception

The way in which the intended audience interprets or understands a message.

Preventable Crisis

A critical situation that can be avoided through the implementation of effective planning and risk management strategies.