Combining and Subdividing Shapes

In this Math Matters episode, Miss Granados teaches about combining and subdividing polygons. The lesson begins with a review of polygon names and properties, followed by instructions on how to combine polygons to form new shapes. Students are guided through creating their own tangrams and using them to explore shape combinations. The lesson also covers subdividing polygons into smaller shapes, with practice exercises and resources provided for further learning.

What materials are needed for the lesson on combining and subdividing shapes?

• Calculator, paper, pen, eraser

• Chalk, board, duster, marker

• Paper, pencil, ruler, scissors

• Notebook, compass, protractor, glue

Which polygon is defined as having exactly three sides and three angles?

• Rectangle

• Square

• Triangle

• Trapezoid

What is a parallelogram with four right angles and two sets of congruent sides called?

• Rhombus

• Rectangle

• Square

• Trapezoid

How can two right isosceles triangles be combined?

• To form a hexagon

• To form a pentagon

• To form a square

• To form a rectangle

What shape can be created by combining a triangle and a trapezoid?

• A larger triangle

• A parallelogram

• A square

• A hexagon

What is the first step in creating your own set of tangrams?

• Cut a circle from the paper

• Draw a hexagon on the paper

• Make a square from a rectangular piece of paper

• Fold a rectangular paper into a triangle

What is the purpose of folding the square paper diagonally twice?

• To create a rectangle

• To create two triangles

• To create a hexagon

• To create a pentagon

What is the process of breaking a shape into smaller shapes called?

• Combining

• Subdividing

• Transforming

• Reflecting

What shapes can result from subdividing a rectangle?

• Pentagons and octagons

• Rectangles and triangles

• Three hexagons

• Two circles

Which of the following is a resource for practicing combining and subdividing shapes?

• Music sheets

• Storybooks

• Coloring books

• Pattern blocks