What is the perimeter of rectangle 3mx6m on the bottom of a triangle?

Answer 1

The perimeter is the sum of all four sides, so you need to calculate 2 x length + 2 x height. The fact that the rectangle is at the bottom of a triangle is irrelevant - except that in specific diagrams, information may be provided that lets you calculate the length or the width of the triangle.

Answer 2

The perimeter of the rectangle is 18 metres. The triangle is not relevant to the perimeter of the rectangle.