What is the formula for the area of a triangle

The video tutorial explains how to calculate the area of a triangle by comparing it to a rectangle. It starts by reviewing the area of a rectangle and how a diagonal divides it into two triangles. The tutorial then focuses on finding the area of a triangle using the formula: half of the base times the height. The explanation emphasizes understanding the difference between calculating the area of a rectangle and a triangle.

What is the significance of the diagonal in a rectangle when discussing triangles?

Why do we multiply the base and height by 1/2 when calculating the area of a triangle?