a 2 + b 2 = c 2 {\displaystyle a^2+b^2=c^2} c = a 2 + b 2 {\displaystyle c=\sqrt{a^2+b^2}}
∠ A S B {\displaystyle \angle ASB}
α {\displaystyle \alpha}
ε {\displaystyle \varepsilon}
x ∈ M {\displaystyle x \in M}
α = ~ β {\displaystyle \alpha \tilde= \beta}
A B ¯ = ~ C D ¯ {\displaystyle \overline{AB} \tilde= \overline{CD}}
1 2 {\displaystyle \frac{1}{2}}
T = 2 ⋅ π ⋅ l g {\displaystyle T=2 \cdot \pi \cdot \sqrt{\frac{l}{g}}}