The video tutorial covers lesson 13.4a, focusing on finding areas using tangrams and composite figures. It explains that a tangram is a square made up of seven polygons called tans, which can be rearranged to form various shapes. The tutorial details how to calculate the area of each tan and compare them. It also introduces the concept of composite figures, which are made from multiple shapes, and explains how to calculate their total area. The lesson concludes with a preview of the next topic on finding areas of polygons.

What is a tangram?

• A type of mathematical equation

• A three-dimensional shape

• A single polygon with no subdivisions

• A type of puzzle made of seven flat polygons

How many square units is the red square tan?

• One square unit

• Two square units

• Half a square unit

• Three square units

Which two tans have the same area as the red square?

• Small blue and small yellow triangles

• Large blue and orange triangles

• Green triangle and pink parallelogram

• Red square and pink parallelogram

What is the area of the large orange triangle?

• Half a square unit

• Three square units

• One square unit

• Two square units

What is the purpose of rearranging tans in a tangram?

• To form shapes with equal areas

• To solve mathematical equations

• To create a single large polygon

• To measure the perimeter

What is a composite figure?

• A type of mathematical equation

• A three-dimensional shape

• A single polygon with no subdivisions

• A figure made from two or more different figures

How can you find the area of a composite figure?

• By breaking it into smaller figures and adding their areas

• By using a ruler to measure its length

• By measuring its perimeter

• By counting the number of sides

What is the combined area of the blue and yellow triangles with the pink parallelogram?

• Half a square unit

• Two square units

• One square unit

• Three square units

Where can you find additional resources for tangrams?

• In a history book

• In a science journal

• In a mathematics textbook

• In the YouTube community section and Facebook photo album

What is the next topic after this lesson?

• Understanding three-dimensional shapes

• Finding areas of polygons

• Calculating perimeters

• Solving algebraic equations