核心问题
请讲一讲数学符号在英语里的读法。
词典解答
下面是一些最常见的数学符号的读法：
<div class="mineru-algorithm" style="white-space: pre-wrap; font-family:monospace;"> + plus; positive (a + b = c) - minus; negative ± plus or minus (the square root of $4a^{2}$ is ±2a) × multiplied by; times (6 × 4 = 24) ÷ or: divided by (24 ÷ 6 = 4) = equals (6 + 2 = 8) ≠ or ≠ is not equal to > is greater than (6 > 5) ≫ is much greater than < is less than (3 < 4) ≪ is much less than ≥ or ≥ is greater than or equal to ≤ or ≤ is less than or equal to ➢ is not greater than ◁ is not less than ≈ is approximately equal to ≡ is identical to ~ equivalent; similar ≅ is congruent to ∞ varies directly as; is proportional to : is to; the ratio of ∴ therefore ∞ infinity ∠ angle; the angle (∠ ABC) | _ right angle ( | _ ABC ) ⊥ the perpendicular: is perpendicular to (AB ⊥ CD) || parallel; is parallel to (AB || CD) ⊙ or ○ circle ⌒ arc of a circle △ triangle □ square □ rectangle </div>