Triangle Perimeter Calculation Quiz

What is the first step in finding the perimeter of a triangle when given sides as algebraic expressions?

• Substitute the variable x with its given value.

• Add the coefficients of x directly.

• Multiply all sides by 2.

• Ignore the variable x.

How do you simplify the expression for the perimeter of the triangle?

• By multiplying all terms by x.

• By adding all the constants together.

• By subtracting the smallest term.

• By combining like terms.

What is the result of substituting x = 4 in the expression 7x + 13?

• 35

• 28

• 41

• 30

In the mental math method, what is the length of the side given by 2x + 7 when x = 4?

• 11

• 15

• 13

• 17

What is the final perimeter of the triangle using the mental math method?

• 40 cm

• 41 cm

• 42 cm

• 39 cm