The ratio of the three sides of a triangle is 2:3:4. The longest side is 12 cm longer than the shortest side. Find the perimeter of the three sides Hurry, hurry, I want it now

The ratio of the three sides of a triangle is 2:3:4. The longest side is 12 cm longer than the shortest side. Find the perimeter of the three sides Hurry, hurry, I want it now

12 ÷ (4-2) × (4 + 3 + 2) = 54 cm (three sides perimeter)
Long side = 54 △ (2 + 3 + 4) × 4 = 24cm
Short side = 24-12 = 12 cm
Third side = 54-24-12 = 18 cm

The ratio of the three sides of the triangle is 7:5:4. If the length of one side of the middle length is twice as long as the sum of the other two sides by 3cm, the perimeter of the triangle is______ ．

Let the three sides of the triangle be 7x, 5x and 4x respectively. According to the meaning of the question, we can get 2 × 5x = 7x + 4x-3, and the solution is x = 3. ∩ the perimeter of the triangle is 7x + 5x + 4x = 16x = 16 × 3 = 48 (CM)

It is known that the circumference of the triangle is 25cm, the length of the second side of the first side formula 2A + B is B + 3cm longer than that of the first side, and the length of the third side of the triangle is calculated
Expressed in algebraic form
When a = 3 and B = 1, the height of the third side is 6.8cm, and the area of the triangle is calculated

When a = 3 and B = 1, the height of the third side is 6.8cm, and the area of the triangle is calculated

The circumference of a triangle with a difference of 5 cm on each side is 120 cm. How long is the shortest side? What about the longest side?

Let the shortest side be x cm long, then the lengths of the other two sides are x + 5, x + 5 + 5 = x + 10
x+(x+5)+(x+10)=120
3x+15=120
3x=105
x=35
The longest side length x + 10 = 35 + 10 = 45