Calculating Area and Perimeter of Triangles

In this video, Mr. Jay explains how to find the area and perimeter of triangles. He begins by defining perimeter as the distance around a shape and area as the space it covers. The video covers two examples: a right triangle and another triangle, demonstrating how to calculate their perimeter by adding side lengths and their area using the formula base times height divided by two. Mr. Jay emphasizes that the order of adding side lengths does not affect the perimeter result. The video concludes with a summary of the calculations and encourages viewers to watch another video for more details.

What is the perimeter of a shape?

• The area covered by the shape

• The distance around the shape

• The length of one side of the shape

• The volume of the shape

How do you calculate the area of a triangle?

• Side plus side plus side

• Length times width

• Base times height

• Base times height divided by 2

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

• Perimeter divided by 3

• Length times width divided by 2

• Base plus height

• 1/2 base times height

What does dividing by 2 in the area formula represent?

• Halving the height

• Halving the base

• Halving the perimeter

• It's a specific property of triangles

In the first example, what is the perimeter of the triangle?

• 60 meters

• 70 meters

• 120 meters

• 50 meters

What is the area of the triangle in the first example?

• 30 square meters

• 240 square meters

• 60 square meters

• 120 square meters

Which side length is not needed when calculating the area of a triangle?

• The base

• The height

• The longest side

• None, all sides are needed

Can the order of adding side lengths affect the perimeter calculation?

• No, the result remains the same

• Yes, it changes the result

• Yes, but only for equilateral triangles

• Only in certain triangles

For the second example, what is the correct perimeter?

• 45 feet

• 75 feet

• 55 feet

• 35 feet

What is the area of the triangle in the second example?

• 75 square feet

• 150 square feet

• 45 square feet

• 100 square feet