# Example 3

- Author:
- Walch Education

- Topic:
- Area

Calculate the area of triangle

*ABC*.*Note*: Drag the blue points to try different figures.- Find the equation of the line that represents the base of the triangle.
- Find the equation of the line that represents the height of the triangle.
- Find the point of intersection of the line representing the height and the line representing the base of the triangle.
- Calculate the length of the base of the triangle.
- Calculate the length of the height from point
*B*to the point of intersection. - Calculate the area of triangle
*ABC*.