Mathematical projection and vision

The geometry is a cone with a radius of 4 at the bottom and a height of 3.

Its volume is 4×4×π×3÷3= 16π (cubic centimeter).

The side development diagram is a sector, the radius of the sector is √(3×3+4×4)=5, and the arc length of the sector is the circumference of the cone bottom equal to 8π, so the area of the sector is 8π×5÷2=20π (square centimeter).

Can a tablet or mid read an office file containing a mathematical formula edited with mathtype?

Is the mathematics of Nongke Road Primary School Beijing Normal University Edition?

Who writes the national college entrance examination papers every year?

Liu Qian revealed the magic of prophecy.

Can the modern teaching method of primary school mathematics completely replace the traditional intuitive teaching method of primary school mathematics? Why?

What professors are there in Huazhong Agricultural University?

Study on pore structure characteristics of reservoir

The fourth grade vertical three digits divided by two digits.

What do you think a good math class should be like?

Catalogue of food science journals