Question

Find the missing length in the following figure.

• A. 3 cm
• B. 5 cm
• C. 6 cm
• D. 7 cm

Answer 1

The correct option is C 6 cm

The perimeter is sum of all sides of a closed shape.
To find the missing side length, we can subtract the sum of all other sides from the perimeter.

Sum of other sides except the missig side
= 4 cm + 8 cm + 5 cm = 17 cm

Length of the missing side
= Perimeter of the figure - sum of other sides
= 23 cm - 17 cm
= 6 cm

Therefore, the length of the missing side equals to 6 cm.