Finding the Area of Triangles: Key Concepts and Techniques

The video tutorial explains how to calculate the area of a triangle by first understanding the area of a rectangle. It demonstrates that a triangle's area is half that of a rectangle with the same base and height. Two methods are used: base times height divided by two, and half times base times height. An example problem is solved using both methods, reinforcing the concept that the area of a triangle is always half the area of a rectangle with the same dimensions.

What is the first shape used to explain the area of a triangle?

• Circle

• Hexagon

• Square

• Rectangle

How do you calculate the area of a rectangle?

• Length + Width

• Length x Width

• Base x Height

• (Base x Height) / 2

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

What is the area of a triangle with a base of 5 inches and a height of 2 inches?

• 10 square inches

• 5 square inches

• 2.5 square inches

• 7.5 square inches

Tags

CCSS.6.G.A.1

Which formula can be used to find the area of a triangle?

• Base x Height

• Base + Height

• Base x Height / 2

• 1/2 x Base x Height

Tags

CCSS.6.G.A.1

What is the relationship between the area of a rectangle and the area of a triangle with the same base and height?

• The area of the triangle is half.

• The area of the triangle is the same.

• The area of the triangle is double.

• There is no relationship.

Tags

CCSS.6.G.A.1

What does dividing by 2 in the formula for the area of a triangle represent?

• The triangle's base

• Half the area of the equivalent rectangle

• The triangle's height

• Doubling the area

Tags

CCSS.6.G.A.1

What demonstrates that the formula for the area of a triangle is accurate?

• Doubling the area of the triangle

• Cutting a rectangle diagonally to form two triangles

• Using it to find the area of a rectangle

• Comparing it to the area of a square

Tags

CCSS.6.G.A.1

What is the area of a triangle with a base of 3 millimeters and a height of 7 millimeters?

• 4.5 square millimeters

• 21 square millimeters

• 10.5 square millimeters

• 14 square millimeters

Tags

CCSS.6.G.A.1

Why is it important to label the area with square units?

• To indicate area

• To indicate length

• To indicate volume

• To indicate width

Tags

CCSS.3.MD.C.6

How can the area of a triangle be found using its base and height?

• Multiplying base by height and then dividing by 2

• Adding base and height

• Dividing the base by the height

• Multiplying base by height

Tags

CCSS.6.G.A.1