How to find the composition of two areas by subtracting their areas

The video tutorial explains how to find the area of a composite shape by calculating the area of a square and subtracting the area of a half circle. The instructor provides formulas for each shape, demonstrates how to plug in values, and performs the calculations step-by-step to arrive at the final area. The tutorial emphasizes understanding the composition of shapes and using basic geometry formulas.

What is the first step in finding the area of a complex shape according to the teacher?

• Find the perimeter of the shape

• Decompose the shape into simpler figures

• Calculate the volume of the shape

• Measure the angles of the shape

Which formula is used to calculate the area of a square?

• 1/2 base times height

• Length times width

• Base times height

• π R-squared

How is the area of a half-circle calculated?

• π R-squared times 2

• Base times height divided by 2

• Length times width divided by 2

• π R-squared divided by 2

What is the radius of the half-circle if the total distance is 8?

• 4

• 8

• 2

• 6

What is the final calculated area of the shape?

• 50.5

• 64

• 25.13

• 38.9