Geometry Problem 1424: Triangle, Parallelogram, Trapezoid, Area, Diagonal, Measurement

The figure below shows a parallelogram ABCD. E is a point on AD and BD intersects CE at F. If the area of triangle BCF is 9 and the area of triangle EFD is 1, find the area of quadrilateral ABFE.
 

Geometry problem 1424: Triangle, Parallelogram, Trapezoid, Area, Diagonal, Measurement, Tutoring

 


Geometric Art of Problem 1424: Sketching, Typography, iPad Apps

Geometric Art of Problem 1424: Triangle, Parallelogram, Trapezoid, Area, Diagonal, Sketching, Typography, iPad Apps, Art, SW, Tutor


Isolines or Contour Lines of Problem 1424

Geometric Art: Isolines or contour lines of Problem 1424: Parallelogram, Triangle, iPad Apps, Art, SW, Tutor

An isoline or contour line of a function of two variables is a curve along which the function has a constant value. Isolines usually have a parallel trend.

See also: Typography and poster of problem 1417.