Finding the Area of Triangles

The video tutorial explains how to find the area of a triangle using the formula (base x height) / 2. It begins with the derivation of the formula from a rectangle and provides multiple examples to illustrate the calculation process. The tutorial also covers how to handle extra information, different units, and how to find missing dimensions when given the area. The final example involves calculating the total area for multiple triangular ornaments.

What is the formula to calculate the area of a triangle?

• Area = Base / Height

• Area = (Base x Height) / 2

• Area = Base x Height

• Area = (Base + Height) / 2

If a triangle has a base of 10 meters and a height of 15 meters, what is its area?

• 75 square meters

• 30 square meters

• 150 square meters

• 25 square meters

What is the area of a triangle with a base of 6 cm and height of 13 cm?

• 78 square cm

• 39 square cm

• 26 square cm

• 19.5 square cm

For a triangle with a base of 4.2 feet and a height of 7 feet, what is the area?

• 29.4 square feet

• 14.7 square feet

• 11.7 square feet

• 21 square feet

What is the area of a triangle with a base of 14 inches and a height of 4 inches?

• 28 square inches

• 56 square inches

• 14 square inches

• 7 square inches

How do you find the height of a triangle when the area and base are known?

• Multiply the base by 2 and divide by the area

• Divide the area by the base and then multiply by 2

• Divide the base by the area and then multiply by 2

• Multiply the area by 2 and divide by the base

If the area of a triangle is 96 square cm and the base is 12 cm, what is the height?

• 16 cm

• 8 cm

• 24 cm

• 12 cm

What is the length of the base if the area of a triangle is 64 square inches and the height is 16 inches?

• 32 inches

• 8 inches

• 16 inches

• 4 inches

If a triangle's base is 30 cm and height is 8 cm, what is its area?

• 48 square cm

• 120 square cm

• 60 square cm

• 240 square cm

Jess wants to paint 7 triangular ornaments, each with a base of 3 inches and height of 4 inches. How much area will she paint?

• 42 square inches

• 14 square inches

• 28 square inches

• 24 square inches