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Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Learn + solve
Solve this faster with the right shortcut first
Shortcut used: Identify the figure and formula, substitute the values, and keep units consistent.
Solve in 3 steps:
- Fix the shape.
- Choose the matching formula.
- Substitute values with units.
Common mistake: Do not use area formula when perimeter or volume is asked.
Question 4
Multiple Choice Question
Question
A circle has radius 5. What is its circumference?
Explanation
Correct Answer: D
ANSWER
Correct Answer: D
Method / Topic: Geometry
Circumference is 2πr = 2π(5) = 10π.
Why this answer is correct
The answer uses the formula that matches the figure and target quantity.
Short Explanation
Circumference is 2πr = 2π(5) = 10π.
Detailed Explanation
Question
A circle has radius 5. What is its circumference?
ANSWER
Correct Answer: D
Method / Topic: Geometry
Circumference is 2πr = 2π(5) = 10π.
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Question 4
Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Learn + solve
Shortcut used, common trap, and the fastest solving route
Shortcut used: Identify the figure and formula, substitute the values, and keep units consistent.
Solve in 3 steps:
- Fix the shape.
- Choose the matching formula.
- Substitute values with units.
Common mistake: Do not use area formula when perimeter or volume is asked.
Question
A circle has radius 5. What is its circumference?
Explanation
Correct Answer: D
ANSWER
Correct Answer: D
Method / Topic: Geometry
Circumference is 2πr = 2π(5) = 10π.
Why this answer is correct
The answer uses the formula that matches the figure and target quantity.
Short Explanation
Circumference is 2πr = 2π(5) = 10π.
Detailed Explanation
Question
A circle has radius 5. What is its circumference?
ANSWER
Correct Answer: D
Method / Topic: Geometry
Circumference is 2πr = 2π(5) = 10π.
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Identify the figure and formula
substitute the values
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