The perimeter of a triangle is 25 inches. If side a is twice side b, which is 1/2 side c, what is the length of side b?
A.) 5 B.) 8 C.) 10 D.) 15
c = side c
1/2c = side b {side b is half side c} c = side a {side a is twice side b} c + (1/2)c + c = 25 {added all sides and set equal to perimeter, 25} 2.5c = 25 {combined like terms} c = 10 {divided each side by 2.5} 1/2(10) = side b {substituted 10, in for c, into 1/2c} 5 = side b {multiplied 1/2 by 10} A.) 5 Ask Algebra House Comments are closed.

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