Question

The following figures are formed by joining six unit squares. Which figure has the smallest perimeter?

• A. A
• B. B
• C. C
• D. D

Answer 1

The correct option is C

C

The perimeter of any shape is the length of the boundary, which can be found by adding the length of the sides at the boundary.

Taking the length of the side as unit length.

(A) Perimeter = $\text{14 units}$

(B) Perimeter = $\text{14 units}$

(C) Perimeter = $\text{10 units}$

(D) Perimeter = $\text{14 units}$

From the above data, we can clearly see that the third shape has smallest perimeter.