半径为1的正六边形的周长是______.
∵∠AOB=3606=60°,OA=OB,
∴OA=OB=AB,
∵半径为1,
∴AB=1,
∴半径为1的正六边形的周长是6.
故答案为:6.
—Can you work out the maths problem?
—Sorry, I can ______ understand its meaning. [ ]
A. almost
B. quite
C. hardly
D. nearly
实事求是思想路线的根本途径和方法是()
A、实事求是
B、一切从实际出发
C、在实践中检验真理和发展真理
D、理论联系实际