Combining Two-Dimensional Shapes

This video tutorial covers lesson 12.3 on combining two-dimensional shapes to form new shapes. It demonstrates how to create trapezoids, rectangles, rhombuses, and hexagons using triangles, squares, and trapezoids. The video also introduces the concept of parallelograms and provides exercises on calculating the number of shapes needed to form specific figures. The tutorial concludes with information on obtaining pattern shapes and encourages students to continue practicing.

What is the main focus of lesson 12.3?

• Combining three-dimensional shapes

• Combining two-dimensional shapes

• Learning about colors

• Studying animal habitats

How many triangles are needed to form a trapezoid?

• Two

• Three

• Four

• Five

What shape is created by combining two squares?

• Rectangle

• Hexagon

• Circle

• Triangle

Which shape is formed by putting two triangles together?

• Square

• Pentagon

• Rhombus

• Circle

How many trapezoids are needed to make a regular hexagon?

• Two

• Three

• One

• Four

How many triangles are required to form a regular hexagon?

• Four

• Six

• Five

• Seven

Which two shapes can be combined to form a parallelogram?

• Two triangles

• Two squares

• Two rhombuses

• Two circles

What combination of shapes can create a regular hexagon?

• Four rectangles

• One trapezoid and three triangles

• Two squares and one triangle

• Three circles

How many rhombuses are needed to form a regular hexagon?

• Three

• Two

• One

• Four

How many squares are needed to make four rectangles?

• Ten

• Eight

• Six

• Four