One side of the triangle is 20 cm, the other is 4 times larger than the first, and the third side is 12 m

One side of the triangle is 20 cm, the other is 4 times larger than the first, and the third side is 12 m smaller than the other. What is the perimeter of the rectangle?

1 side – 20 cm
2nd side -?, 4 times more (than the first, show with an arrow)
3rd side -?, 12 cm less (than the second, show with an arrow)
P triangle -?
Decision:
1) 20 * 4 = 80 (cm) – the second side
2) 80 – 12 = 68 (cm) – third party
P = 20 cm + 80 cm + 68 cm
P = 168 (cm)
Answer: The perimeter of the triangle is 168 centimeters.