Maltese painted frogs can have triangular shaped pupils. Please see the related link for more information...
Oriental fire-bellied toads, and a few other closely related toads have triangular pupils. These amphibians live in Korea and nearby Russia and on some Japanese islands.
Bears and Goats.
They are rectangular.
It helps the pupil let in the right amount of light.
the triangular shaped part on the middle underside of a horses hoof
There are a few small bugs that are triangular in shape namely Troilus luridus, Sloe Bug, Striped Shieldbug, Green Shield Bug.
Yes, and only a few species have rectangular eyes. Sheep, Goats, Octopuses and Toads have these rectangular shaped pupils. Typically classified as prey, these animals need to have a defense both day and night. But they don't have vertical slits due to their need to survey their surroundings more accurately. The narrower the pupil in relation to the horizon, the greater the accuracy of depth perception is in the peripheral vision of the animal. The perception of depth must be considered with these animals who spend their time evading predators in a rugged terrain. From The Evolution of The Rectangular Eye http://www.science20.com/variety_tap/evolution_rectangular_eye
Sheep
A pyramid is triangular shaped.
They are rectangular.
Animal pupils come all different shapes and sizes. A cat has slit shaped pupils, and a chicken has round pupils. Some goats even have time glass shaped pupils. Many different shapes.
a triangular pyramid has six edges and four triangular shaped faces
There are several species of mongooses, with all studied specimens having horizontal-shaped pupils such as Herpestes auropunctatus, herpestes parvula, and Cynitctis penicillata. This is fairly unique as mongooses are some of the only predatory animals with horizontal pupils.
Four.
Hippo
No. It is round.
its just abandage that's shaped triangular does it matter
Yes all animals with eyes have pupils.
Goats have retagular shaped pupils.