The visualizations of definite integral for area problems are considered. The functions defined by definite integral, the convolution and the composite of integrals are visualized and analyzed. The definitions of fractional integral and derivative are introduced and visualized by using GeoGebra Packages. The presented visualizations were used in teaching calculus for the students, mayor physics, at the Faculty of Science, University of Novi Sad. The students were tested after the presentations and they show good results.