maths
posted by uzoma
The sides of an equilateral triangle are 3a+2, 3ba and b+3 respectively. what is the value of a and b and find the perimeter of the triangle

Arora
All sides of an equilateral triangle are equal.
So,
3a + 2 = 3b  a
=> 4a  3b = 2 ....1
3b  a = b + 3
=> 2b  3 = a ....2
Put (2b3=a) in ....1
=> 4(2b  3)  3b = 2
=> 8b  12  3b = 2
=> 5b = 10
=> b = 2
Now you can obtain 'a' too
Add all sides to find the perimeter.
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