Area: Isosceles Triangle

The video tutorial explains the properties of isosceles triangles and how to calculate their area using the formula 1/2 times base times height. It introduces the AT chart as a tool to organize calculations and provides a step-by-step guide to solving area problems. The tutorial includes example problems to demonstrate the process.

What is a defining characteristic of an isosceles triangle?

• It has at least two sides of equal length.

• All angles are different.

• All sides are of different lengths.

• It has no equal sides.

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

• Area = 1/2 * base * height

• Area = base * height

• Area = base / height

• Area = base + height

In the example, what is the area of the isosceles triangle with a base of 7 cm and height of 9 cm?

• 28 cm squared

• 45 cm squared

• 63 cm squared

• 31.5 cm squared

What is the purpose of using a T chart in the calculation process?

• To measure the sides of the triangle

• To draw the triangle

• To find the perimeter of the triangle

• To organize the written explanation and mathematical operations

For a triangle with a base of 5 inches and height of 6 inches, what is the calculated area?

• 20 inches squared

• 30 inches squared

• 15 inches squared

• 25 inches squared