Asked by Anabelle
A 6m ladder is placed against a wall with its base 2m from the wall . How high is the top of the ladder above the ground ? Round of your answer to two decimal places
Answers
Answered by
Bosnian
Pythagorean theorem:
c² = a² + b²
given:
the ladders are long c = 6 m
base is a = 2 m
b = height of ladder above ground
b = √ ( c² - a² )
b = √ ( 6² - 2² )
b = √ ( 36 - 4 )
b = √ 32
b = 5.656854249 m
To round a number to a two decimal places, look at the number in the third decimal place.
Leave the second decimal same if the number in the third decimal is less than 5
(this is called rounding down)
Increase the second decimal by 1 if the number in the third decimal is 5 or more
(this is called rounding up)
In this case number in the third decimal is 6 so increase the second decimal by 1:
b = 5.66 m
rounded on two decimal places
c² = a² + b²
given:
the ladders are long c = 6 m
base is a = 2 m
b = height of ladder above ground
b = √ ( c² - a² )
b = √ ( 6² - 2² )
b = √ ( 36 - 4 )
b = √ 32
b = 5.656854249 m
To round a number to a two decimal places, look at the number in the third decimal place.
Leave the second decimal same if the number in the third decimal is less than 5
(this is called rounding down)
Increase the second decimal by 1 if the number in the third decimal is 5 or more
(this is called rounding up)
In this case number in the third decimal is 6 so increase the second decimal by 1:
b = 5.66 m
rounded on two decimal places
Answered by
Vive Tekuru
How do we round out the number
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