Understanding Area and Perimeter of Right Triangles

In this video, Mr. Jay explains how to find the area and perimeter of a right triangle. He begins by defining perimeter as the distance around a shape and area as the space it covers. The video demonstrates how to calculate the perimeter by adding side lengths and the area using the formula base times height divided by 2. An example is provided using a right triangle with side lengths of 15, 17, and 8 meters, resulting in a perimeter of 40 meters and an area of 60 square meters. The video concludes with a recap of the methods used.

What is the perimeter of a shape?

• The length of the longest side of the shape

• The total area covered by the shape

• The distance around the outside of the shape

• The amount of space inside the shape

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

• Base plus height divided by 2

• Base plus height

• Base times height divided by 2

• Base times height

How do you find the perimeter of a triangle?

• Multiply all side lengths

• Add all side lengths

• Subtract the smallest side from the largest

• Divide the sum of the side lengths by 2

What is the perimeter of a triangle with sides 15m, 17m, and 8m?

• 32 meters

• 40 meters

• 42 meters

• 50 meters

Which side lengths are needed to calculate the area of a right triangle?

• Only the longest side

• Only the base and height

• All three side lengths

• Only the hypotenuse

What is the area of a right triangle with a base of 8m and a height of 15m?

• 30 square meters

• 90 square meters

• 120 square meters

• 60 square meters

What is the result of 8 times 15 divided by 2?

• 90

• 30

• 120

• 60

What is the final area of the right triangle in the example?

• 40 square meters

• 60 square meters

• 100 square meters

• 80 square meters

What should you remember when calculating the perimeter of a triangle?

• Multiply the side lengths

• Add all the side lengths

• Divide the sum of the side lengths by 2

• Subtract the smallest side from the largest

Which formula can be used alternatively to base times height divided by 2 for area?

• Base plus height

• One-half times base times height

• Base times height

• Base minus height