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This triangle has two equal sides of length a and a third side b. Which rule gives its perimeter?

Class 6Rules and Formulas with VariablesAlgebra

A $2 a + b$
Ba + b
C $2 b + a$
D $3 a$

Step-by-Step Solution

Perimeter =

a + a + b = 2 a + b . (3 a

would be right only if all three sides were a.)

Answer: A)

2 a + b

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