Area of a Right Triangle

This lesson teaches how to find the area of a right triangle using the formula A = (base * height) / 2. It explains the properties of a right triangle, derives the formula by comparing it to a rectangle, and provides a step-by-step example calculation. The lesson concludes by emphasizing the importance of using square units in area calculations.

What is a defining characteristic of a right triangle?

• It has all angles less than 90 degrees.

• It has one angle greater than 90 degrees.

• It has one angle measuring 90 degrees.

• It has two equal sides.

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

• A = b + h

• A = b * h

• A = (b * h) / 2

• A = 2 * (b + h)

How is the area of a right triangle related to the area of a rectangle?

• The area of the triangle is twice the area of the rectangle.

• The area of the triangle is half the area of the rectangle.

• The area of the triangle is equal to the area of the rectangle.

• The area of the triangle is unrelated to the area of the rectangle.

If the base of a right triangle is 8 cm and the height is 5 cm, what is its area?

• 40 cm²

• 30 cm²

• 10 cm²

• 20 cm²

Why is it important to include square units when labeling the area of a triangle?

• Because it makes the number larger.

• Because it is a convention in geometry.

• Because it helps in converting to other units.

• Because it indicates the measurement is in two dimensions.