Math Problem Statement
Find the degree of the hand of the clock at 7:46
Solution
To calculate the angle between the hour and minute hands of a clock at 7:46, we can break the process down into steps:
Step 1: Calculate the position of the minute hand
The minute hand moves 360° in 60 minutes, so it moves per minute.
At 46 minutes: This means the minute hand is 276° from the 12 o'clock position.
Step 2: Calculate the position of the hour hand
The hour hand moves 30° per hour (since ). At exactly 7:00, the hour hand is at: However, since it's 46 minutes past 7, the hour hand has moved further. The hour hand moves per minute (since ).
So, in 46 minutes, the hour hand moves: Thus, the total position of the hour hand is:
Step 3: Calculate the angle between the hour and minute hands
The angle between the hands is the absolute difference between their positions:
Therefore, the degree of the hands of the clock at 7:46 is 43 degrees.
Would you like more details on this, or have any questions?
Here are 5 related questions to expand on this topic:
- How do you calculate the angle between the hands of a clock at 3:15?
- What is the smallest angle between the hands of the clock at 9:20?
- How many degrees does the hour hand move in 10 minutes?
- How can you calculate the angle of the hands at any given time?
- How does the speed of the hour hand compare to that of the minute hand?
Tip: When calculating clock angles, always remember that the minute hand moves 6° per minute, while the hour hand moves 0.5° per minute.
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Math Problem Analysis
Mathematical Concepts
Geometry
Clock Angles
Linear Motion of Clock Hands
Formulas
Angle of the minute hand = minutes × 6
Angle of the hour hand = (hour × 30) + (minutes × 0.5)
Angle between hands = |Angle of minute hand - Angle of hour hand|
Theorems
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Suitable Grade Level
Grades 5-7