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Height = 35

this pyramid can be inscribed in a truncated cone with base radii r = 35 mm and R = 55 mm

Height = 50

this pyramid can be inscribed in a truncated cone with base radii r = 25 mm and R = 50 mm

Height = 80

this pyramid can be inscribed in a truncated cone with base radii r = 20 mm and R = 50 mm

The “business card” of the Republic of Belarus is a new building of the National Library in Minsk. The...

The article in “Science and Life” (1989, №6, Cherenkov A. Khramov V.) tells about an interesting way...

Stamps cover all significant events happening in the world. Much attention was paid to polyhedra by...

Under the guidance of Tatyana Yurievna Timofeyeva, a teacher of mathematics, the guys worked on...

The festival of fascinating science was held in Moscow on April 24 and 25, 2015 at the physics...

(challenging task called “the star”) It consists of 6 symmetrical small bars of complex shapes...

One can specify the following mathematical characteristics in each of the five Platonic solids: 1....