Count the number of vertices (corners) and sides on the given 2-D shapes
Home / 3rd grade / Shapes / Properties of 2-D shapes / How many vertices and sides
Regular named 2D shapes have a set number of sides which is part of their definition. They also have a set number of vertices (corners). In this topic you are asked to identify how many sides and vertices each named shape has (circles and ovals are not thought of as having sides and certainly do not have vertices).
Quadrilaterals: All quadrilaterals have 4 sides - that is how a quadrilateral is defined. The quadrilaterals include the square, rectangle, kite, rhombus and trapezoid. By definition, all quadrilaterals also have 4 vertices.
Triangles: All triangles have 3 sides and 3 vertices.
More than 4 sides: pentagon, hexagon, etc. A pentagon has 5 sides and 5 vertices, a hexagon has 6 and 6, a septagon has 7 and 7 and an octagon has 8 sides and 8 vertices.
So the general rule is that a regular 2-dimensional shape has the same number of vertices as it has sides.
In this topic you are shown a series of diagrams of regular 2D shapes. You must give the number of sides and vertices for each shape.
Below is a table showing the first 8 question answer pairs for the topic "How many vertices and sides" as used in the lessons for this topic. Our games and tests for the topic use these 8 items plus 16 additional question answer pairs.
The topic "How many vertices and sides" is in the category Shapes for 3rd grade (ages 8 to 9).
Home / 3rd grade / Shapes / Properties of 2-D shapes / How many vertices and sides
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