Perimeter and area numbers

Exercise and reference answers

Questions

1. Answer

   20

   Question

   Perimeter of a square of side 5

2. Answer

   6

   Question

   Semi-perimeter of a 3, 4, 5 triangle

3. Answer

   6

   Question

   Area of the 3, 4, 5 triangle

4. Answer

   20

   Question

   Perimeter of a rectangle 4 by 6

Instructions

Type the number only.

Explanation