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Home » 计算圆心角为60°的圆弧长度，圆的半径为10 cm。 - 500apps

计算圆心角为60°的圆弧长度，圆的半径为10 cm。 - 500apps

📅 March 14, 2026 👤 scraface

Mar 14, 2026

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📌 Chemical B: \( 150 \times 0.3 = 45 \)

📌 Total used: \( 60 + 45 = 105 \)

📌 Clean tubes: \( 150 - 105 = 45 \)

📌 The sum of three consecutive even integers is 126. What is the largest integer?

📌 Sum: \( x + (x+2) + (x+4) = 126 \)

📌 Simplify: \( 3x + 6 = 126 \)

📌 Subtract 6: \( 3x = 120 \)

📌 Divide: \( x = 40 \)

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Multiply numerator and denominator by $\sqrt{3} + 1$:
= \frac{(\sqrt{3} + 1)^2}{(\sqrt{3} - 1)(\sqrt{3} + 1)} = \frac{3 + 2\...
\boxed{2 + \sqrt{3}}
Question: A historian discovers a triangular tablet with sides 17 cm,...
Solution: Use the formula for the circumradius $R$ of a triangle:
R = \frac{abc}{4A}
where $a = 17$, $b = 25$, $c = 28$, and $A$ is the area. First, comput...
s = \frac{17 + 25 + 28}{2} = 35
Then compute the area using Heron’s formula:
A = \sqrt{35(35 - 17)(35 - 25)(35 - 28)} = \sqrt{35 \cdot 18 \cdot 10...

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