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

• First figure (green): It has 5 sides, so it's a pentagon.
• Second figure (blue, top - right): It has 5 sides, so it's a pentagon.
• Third figure (blue, bottom - left): It has 5 sides, so it's a pentagon.
• Fourth figure (purple): It has 4 sides (a quadrilateral), so it's not a pentagon.

Answer:

The pentagons are the first (green - sided), second (blue - sided top - right), and third (blue - sided bottom - left) figures.