Question

answer the questions about the polygons below.
which figure is a triangle?
which figure is a quadrilateral?
which figure is a heptagon?

Explanation:

Step1: Recall definitions

A triangle has 3 sides, a quadrilateral has 4 sides, and a heptagon has 7 sides.

Step2: Count sides of each figure

• Figure A: Count the vertices (connected by sides). There are 7 vertices, so 7 sides. A heptagon has 7 sides.
• Figure B: Count the vertices. There are 3 vertices, so 3 sides. A triangle has 3 sides.
• Figure C: Count the vertices. There are 5 vertices, so 5 sides.

Answer:

• Which figure is a triangle? Figure B
• Which figure is a quadrilateral? None
• Which figure is a heptagon? Figure A