That's "One Half" Base Times Height Thank You.
I really like this short you have here. The art does have have this sort of "minimalistic" feel to it, but the animation quality and use of different perspectives, and the facial features make it very charming. I notice the guy has like a pink body and blue arms. Anything special about that or to it? Just wondering, he's a fine character. I like how you express his love for mathematics in the way he sees angles in the grass and a circumference in the sun. The funny thing is that mathematicians are stereotypically "indoors" kind of people, but this guy gets interested in the outdoors when he starts seeing the things he is studying in nature.
Will you make a sequel called A Squared Plus B Squared Equals C Squared?