These 10 math valentines are GIF images of hearts produced on the computer using polar coordinates. The equation used to generate the hearts is written at the top of each valentine. The background is transparent, so the pictures can be printed on colored paper or in documents allowing the background to show through. Use them on documents that you hand out to the students, or let the students place the images on paper and make their own valentines. Although the Valentines can be used by children of all ages, the mathematical equations used are appropriate for high school students.