Question

select all the pentagons.

Explanation:

Step1: Recall the definition of a pentagon

A pentagon is a polygon with 5 sides and 5 angles.

Step2: Analyze each figure

• Top - left figure: Count the sides. It has 5 sides, so it is a pentagon.
• Top - right figure: Count the sides. It has 5 sides, so it is a pentagon.
• Bottom - left figure: Count the sides. It has 5 sides, so it is a pentagon.
• Bottom - right figure: Count the sides. It has 5 sides, so it is a pentagon.

Answer:

All four figures (the top - left green - sided figure, the top - right blue - sided figure, the bottom - left blue - sided figure, and the bottom - right brown - sided figure) are pentagons. So we select all of them.