Angles, averages and calendar Flashcards
Complete the blanks in the following sentence: The mean is a type of average. To find the mean, [BLANK - two words] all the numbers and [BLANK - one word] by [BLANK - four words].
mean
How many days are there in October?
31
How many degrees are there in a half turn
180°
How many days are there in March?
31
How many days are there in December?
31
What does it tell you about the number of degrees in an angle if you know that it’s a reflex angle
It has more than 180°
How many days are there in November?
30
How many degrees are there in a right angle
90°
What number of degrees must the angles on a straight line add up to?
180°
How many days are there in May?
31
What does it tell you about the number of degrees in an angle if you know that it’s an obtuse angle
It has more than 90° and less than 180°
How many days are there in January?
31
How many weeks are there in a year?
52 [plus 1 day in a normal day or plus 2 days in a leap year]
How many days are there in a year (if it isn’t a leap year)?
365
How many days are there in April?
30
How many days are there in February (except in a leap year)?
28
How many days are there in June?
30
What number of degrees must the angles inside a triangle add up to?
180°
How many days are there in August?
31
How many degrees are there in a full turn?
360°
How many days are there in September?
30
What does it tell you about the number of degrees in an angle if you know that it’s an acute angle?
It is less than 90°
How many days are there in a leap year?
366
How many days are there in February in a leap year?
29
How many days are there in July?
31
What number of degrees must the angles inside a quadrilateral add up to?
360°
Which months have exactly 30 days?
April, June, September, November [i.e. the 4th and 6th months in the year and the 9th and 11th months in the year]
Complete the blank in the following sentence: To find the [BLANK], add up all the numbers and divide by how many there are.
mean
Which months have exactly 31 days?
January, March, May, July, August, October, December [i.e. the 1st, 3rd, 5th and 7th months in the year, and the 8th, 10th and 12th months in the year]
