What is a possible way to tile the plane with a pentagon with two 90° angles and three equal obtuse angles?
I: three at a vertex
II: three or four at a vertex
A) I only
B) II only
C) both I and II
D) neither I nor II

Question

What is a possible way to tile the plane with a pentagon with two 90° angles and three equal obtuse angles? 
I: three at a vertex
II: three or four at a vertex
A) I only
B) II only
C) both I and II
D) neither I nor II

Quizplus · Accepted Answer

A pentagon with two 90° angles and three equal obtuse angles can tile the plane by having three or four pentagons meet at a vertex.

What Is a Possible Way to Tile the Plane with a Pentagon