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Clock Geometry. Half Past Quarter Past Quarter Till. How many hours does one revolution of the minute hand around the face of a clock represent?. How many hours does one revolution of the minute hand around the face of a clock represent?. 1.

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Clock

Geometry


Half Past

Quarter Past

Quarter Till




How many minutes does one revolution of the minute hand around the face of a clock represent?


How many minutes does one revolution of the minute hand around the face of a clock represent?

60


If there are 12 numbers on a clock, how many minutes are there between 2 consecutive numbers?


If there are 12 numbers on a clock, how many minutes are there between 2 consecutive numbers?

60 ÷12=5


How many minutes are there between the numbers 12 and 6? there between 2 consecutive numbers?


How many minutes are there between the numbers 12 and 6? there between 2 consecutive numbers?

5x6=30


30 is what part of 60? there between 2 consecutive numbers?


30 is what part of 60? there between 2 consecutive numbers?

One half


How is another way to express the time 12:30? there between 2 consecutive numbers?


How is another way to express the time 12:30? there between 2 consecutive numbers?

Half past twelve


How many minutes are there between the numbers 12 and 3? there between 2 consecutive numbers?


How many minutes are there between the numbers 12 and 3? there between 2 consecutive numbers?

5x3=15


15 is what part of 60? there between 2 consecutive numbers?


15 is what part of 60? there between 2 consecutive numbers?

One quarter


How is another way to express the time 12:15? there between 2 consecutive numbers?


How is another way to express the time 12:15? there between 2 consecutive numbers?

Quarter past twelve


How many minutes are there between the numbers 9 and 12? there between 2 consecutive numbers?


How many minutes are there between the numbers 9 and 12? there between 2 consecutive numbers?

5x3=15


15 is what part of 60? there between 2 consecutive numbers?


15 is what part of 60? there between 2 consecutive numbers?

One quarter


How is another way to express the time 12:45? there between 2 consecutive numbers?


How is another way to express the time 12:45? there between 2 consecutive numbers?

Quarter till one


The Clock as there between 2 consecutive numbers?

A Geometric

Figure



What geometric figure does the face of this clock represent? there between 2 consecutive numbers?

A circle


How many degrees are there in a circle? there between 2 consecutive numbers?


How many degrees are there in a circle? there between 2 consecutive numbers?

360°





If a clock can be seen as a circle, how many degrees does each minute represent?

360°÷60=6°










If we draw a line from the center of the clock to the number 12, another line from the number 12 to the number 3, and a third line from the number 3 back to the center of the clock, what geometric figure do we have?


If we draw a line from the center of the clock to the number 12, another line from the number 12 to the number 3, and a third line from the number 3 back to the center of the clock, what geometric figure do we have?

A triangle


If there are 90° between the number 12 and the number 3, how many degrees are there in the angle at the center of the circle?


If there are 90° between the number 12 and the number 3, how many degrees are there in the angle at the center of the circle?

90°


Can this triangle be called a right triangle? how many degrees are there in the angle at the center of the circle?


Can this triangle be called a right triangle? how many degrees are there in the angle at the center of the circle?

Yes, a right triangle is a triangle with one 90° angle.


If the three angles of a triangle add up to 180°, and the angle at the center of the circle is 90°, and the other two angles are equal, how many degrees are in each?


If the three angles of a triangle add up to 180°, and the angle at the center of the circle is 90°, and the other two angles are equal, how many degrees are in each?

180°-90°= 90°

90°÷2=45°





Can this triangle be called an isosceles triangle? on its circumference equal?

Yes, an isosceles triangle is a triangle with two equal sides and two equal angles.




If we draw a line from the center of the clock to the number 5, another line from the number 5 to the number 7, and a third line from the number 7 back to the center of the clock, what geometric figure do we have?


If we draw a line from the center of the clock to the number 5, another line from the number 5 to the number 7, and a third line from the number 7 back to the center of the clock, what geometric figure do we have?

A triangle


If there are 60° between the number 5 and the number 7, how many degrees are there in the angle at the center of the circle?


If there are 60° between the number 5 and the number 7, how many degrees are there in the angle at the center of the circle?

60°


If the three angles of a triangle add up to 180°, and the angle at the center of the circle is 60°, and the other two angles are equal, how many degrees are in each?


If the three angles of a triangle add up to 180°, and the angle at the center of the circle is 60°, and the other two angles are equal, how many degrees are in each?

180°-60°= 120°

120°÷2=60°


Can this triangle be called an equilateral triangle? angle at the center of the circle is 60°, and the other two angles are equal, how many degrees are in each?


Can this triangle be called an equilateral triangle? angle at the center of the circle is 60°, and the other two angles are equal, how many degrees are in each?

Yes, a triangle with three 60° angles is an equilateral triangle.


Review angle at the center of the circle is 60°, and the other two angles are equal, how many degrees are in each?


An hour has 60 minutes. angle at the center of the circle is 60°, and the other two angles are equal, how many degrees are in each?

15 minutes make a quarter hour.

For 15 minutes after an hour we can say quarter past the hour.


4. For 45 minutes after an hour we can say quarter till the next hour.

5. For 30 minutes after an hour we can say half past the hour.


6. A circle has 360°. next hour.

7. Each minute on a clock represents 6° on the circumference of a circle.

8. A triangle has three sides.


9. A right triangle has one 90° angle. next hour.

10. An isosceles triangle has two equal sides and two equal angles.


11. An equilateral triangle has three equal sides and three 60° angles.

12. Geometry is everywhere. Just look for it!


Prepared by 60° angles.

Robert Janak

Beaumont,

Texas


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