Perimeter of triangle 3, 4, 5

Step by step, with the reason for every step · Perimeter and area · Geometry

Step by step

Question: find the perimeter of a triangle with sides 3, 4, 5.

The perimeter is the way all around the edge.

We add every side.

Walk around and add: 5 + 4 + 3.

P = 5 + 4 + 3

5 plus 4 is 9.

P = 9 + 3

9 plus 3 is 12.

So the perimeter is 12.

P = 12

Answer

P = 12

Try this one yourself, then check:

Find the perimeter.

Show the answer

P = 17