heyitseddie06
09.08.2019 •
Mathematics
The perimeter of a triangle is 90 centimeters. if two sides are equally long and the third side is 9 centimeters longer than the others, find the lengths of the three sides.
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Ответ:
All three sides are 27 cm, 27 cm and 36 cm
Step-by-step explanation:
Let the sides of that triangle are x, x, y cm.
Now as per statement of the question two sides are equal and third side is 9 centimeters longer than the others.
So y = x + 9
Now perimeter of the triangle is 90 cm
so x + x + y = 90
Now we replace the value of y from the equation given above
x + x + ( x + 9) = 90
3x + 9 = 90
3x = 90 - 9
3x = 81
x = 27 cm
Therefore, all three sides of the triangle are 27 cm, 27 cm, 36 cm
Ответ: