2nd Grade Geometry

What are vertices?

• A flat or plane, two-dimensional closed shape with straight sides.

• A corner or point where the edges meet

• A line segment where two faces meet

What are edges?

• A line segment where two faces meet

• The point at which three or more edges meet in a solid

• The top of highest point

What are faces on a shape?

• The front part of the head, from the forehead to the chin

• A corner or point where the edges meet

• The flat surfaces of a 3-D figure

2D Shapes are...

• Shapes that are 2 dimensional and aren't flat

• A shape that is 3-dimensional and isn't flat

• Shapes that are flat and have 2 dimensions

3D shapes are...

• Shapes that are 3-dimensional and are flat

• Solid figure; classified by their faces, their edges and vertices; 3-dimensional

• Shapes that are flat and have 2 dimensions

What are polygons?

• A five sided shape that looks like a house

• A flat or plane, two-dimensional closed shape with straight sides.

• Cube, rectangular prism, sphere

• A closed figure made up of curved edges

What is a quadrilateral?

• An open figure made up of 4 sides

• Triangle, sphere, cone

• A flat or plane, two-dimensional closed shape with straight sides.

• 4 sided polygon

What is the difference between a square and rectangle?

• Nothing, they are the same shape

• All the 4 sides/edges of a rectangle are equal, whereas a squares has its opposite sides

• All 4 sides/edges of a square are equal, whereas a rectangle has its opposite sides equal

• One has 3 edges, whereas the other has 4 edges

Examples of quadrilaterals

• Parallelogram, trapezoid, rhombus, rectangle, square, etc.

• Circle, triangle, star, pentagon

• Cube, rectangular prism, pyramid

• Hexagon, Octogon, Pentagon

What are examples of polygons?

• Open triangle, open hexagon, and open octagon

• Triangle, pentagon, hexagon, octagon, etc.

• Triangular prism, cone, hemisphere

• Cube, cylinder, sphere