select all the pentagons.

Answer:

The second, third, and fourth shapes are pentagons.

Explanation:

Step1: Recall pentagon definition

A pentagon is a polygon with 5 sides.

Step2: Analyze first shape

The first shape is a rectangle (4 - sided), not a pentagon.

Step3: Analyze second shape

The second shape has 5 sides, so it is a pentagon.

Step4: Analyze third shape

The third shape has 5 sides, so it is a pentagon.

Step5: Analyze fourth shape

The fourth shape has 5 sides, so it is a pentagon.