# Topic 15 Classifying Plane Figures Common Core Standards: 5.G.3

```Topic 15 Classifying Plane Figures
Common Core Standards: 5.G.3: Understand that attributes belonging to a category of
two-dimensional figures also belong to all subcategories of that category.
5.G.4: Classify two dimensional figures in a hierarchy based on properties.
Vocabulary: polygon, regular polygon, triangle, quadrilateral, pentagon, hexagon,
octagon, equilateral triangle, isosceles triangle, scalene triangle, right triangle, acute
triangle, obtuse triangle, parallelogram, trapezoid, rectangle, rhombus, square,
generalization
Monday: (Topic 15-1) Polygons
Students identify and classify polygons. Plane shapes have many properties that make
them different from one another. Polygons can be described and classified by their
sides and angles.
View brainpopjr video Plane Shapes, Brainpop video Polygons, and Math’s Mansion
Angle Man.
Assignment: Practice 15-1
Tuesday: (Topic 15-2) Triangles
Students identify and classify triangles. Plane shapes have many properties that make
them different from one another. Polygons can be described and classified by their
sides and angles.
View Math’s Mansion Video Triangle Delight and Brainpop video Types of Triangles
Assignment: Practice 15-2
Wednesday: (Topic 15-3) Properties of Quadrilaterals
Students identify and classify quadrilaterals. Plane shapes have many properties that
make them different from one another. Polygons can be described and classified by
their sides and angles.
View Math’s’ Mansion videos Rectangle Delight and Quadrilaterals
Assignment: Practice 15-3
Students will learn about the properties of special quadrilaterals. Classify twodimensional shapes into categories based on their properties.
View Math’s’ Mansion videos Rectangle Delight and Quadrilaterals
Assignment: Practice 15-4
Students will sort a variety of quadrilaterals to develop the hierarchy or “family tree” for
quadrilaterals. Classify two-dimensional shapes into categories based on their
properties.
View Math’s’ Mansion videos Rectangle Delight and Quadrilaterals
Assignment: Practice 15-5
Monday: (Topic 15-6) Problem Solving: Make and Test Generalizations
Students make and test generalizations of patterns in different examples.
Commonalities in attributes of objects or situations can be found and used to make