A segment AB, the length of which is three quarters of 12 cm, how much is it in cm?
| September 3, 2021 | education
The unknown number of centimeters, which is 3/4 of 12 cm, is denoted by the letter X.
We need to contrast in proportion 12 centimeters, as 4/4 of the total number of centimeters, and an unknown number of centimeters X, as 3/4 of the total number of centimeters.
From the compiled proportion, we determine the unknown length of the segment AD:
12 cm – make up 4/4 of the total number of centimeters;
X cm – make up 3/4 of the total cm;
X = 12 cm * 3/4 / 4/4 = 9 cm.
Answer: The length of the segment AD is 9 cm.
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