Understanding Shaded Area Calculations

This video tutorial teaches how to find the area of shaded regions by subtracting the area of one shape from another. It covers various examples, including subtracting circles from squares, rectangles from rectangles, and parallelograms from squares. The tutorial emphasizes the importance of calculating the area of each shape and then using subtraction to find the shaded area. Key concepts include understanding compound shapes and applying basic geometry formulas.

What is the first step in finding the area of a shaded region?

• Multiply the areas of all shapes

• Divide the area of one shape by another

• Add the areas of all shapes

• Subtract the area of one shape from another

If a square has a side length of 10, what is its area?

• 50 square units

• 200 square units

• 150 square units

• 100 square units

How do you find the radius of a circle if the diameter is 10?

• Add 5 to the diameter

• Divide the diameter by 2

• Multiply the diameter by 2

• Subtract 5 from the diameter

What is the area of a rectangle with dimensions 8 by 10?

• 100 square units

• 80 square units

• 40 square units

• 18 square units

In a U-shaped figure, how do you find the shaded area?

• Subtract the area of the small rectangle from the big rectangle

• Divide the area of the big rectangle by the small rectangle

• Multiply the areas of the big and small rectangles

• Add the areas of the big and small rectangles

What is the area of a square with a side length of 14?

• 150 square units

• 100 square units

• 196 square units

• 200 square units

How do you calculate the area of a triangle?

• Base minus height

• Base times height divided by 2

• Base times height

• Base plus height

What is the area of a parallelogram with a base of 13 and height of 10?

• 150 square units

• 160 square units

• 140 square units

• 130 square units

If a circle has a radius of 5, what is its area using 3.14 for π?

• 100 square units

• 78.5 square units

• 25 square units

• 50 square units

What is the final step in finding the area of a shaded region?

• Multiply the areas of the two shapes

• Add the areas of the two shapes

• Subtract the area of the cut-out shape from the larger shape

• Divide the area of the larger shape by the cut-out shape