Question

Name only the quadrilaterals. Explain in words why they are quadrilaterals and which are not.
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Answer 1

Well, by definition a quadrilateral is a polygon that has just four sides, four vertices, and four corners. Knowing this, let's take a look at our choices.

Choice A is a quadrilateral because it has 4 sides, 4 vertices, and 4 corners.
Choice B is a quadrilateral because it has 4 sides, 4 vertices, and 4 corners.
Choice C is NOT a quadrilateral because it does NOT have 4 sides, which means it does not have 4 corners or 4 vertices.
Choice D is NOT a quadrilateral; it has no vertices at all and no corners, and thus has just one side; itself. Technically you could say a circle has infinite sides as well.
Choice G is a quadrilateral because it has 4 sides, 4 vertices, and 4 corners.
Choice H is NOT a quadrilateral because it has 5 sides, 5 vertices, and 5 corners.
Choice I is a quadrilateral because it has 4 sides, 4 vertices, and 4 corners.

Hope I helped! Rock on! ^_^

Answer 2

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