Given triangle $yxz$ with side $yx$ = $3.5$ in, side $xz$ = $5.3$ in, and side $yz$ = $6.4$ in, what is the perimeter of the triangle?

• A. $7.8$ in
• B. $15.2$ in
• C. $13.5$ in
• D. $9.9$ in

Answer: (B)

Verified step by step guidance

1. Identify the sides of the triangle given: side \( yx = 3.5 \) inches, side \( xz = 5.3 \) inches, and side \( yz = 6.4 \) inches.
2. Recall that the perimeter of a triangle is the sum of the lengths of all its sides.
3. Write the formula for the perimeter \( P \) as: \[ P = yx + xz + yz \]
4. Substitute the given side lengths into the formula: \[ P = 3.5 + 5.3 + 6.4 \]
5. Add the values together to find the perimeter (do not calculate the final sum here, just set up the expression).