alleryThe perimeter of a rectangle with length a and width b is:
Aa + b
Bab
C2(a + b)
D2ab
Answer & Solution
Correct answer: C. 2(a + b)
A rectangle has two equal pairs of opposite sides — length a and width b.
Perimeter = a + b + a + b = 2(a + b).
For a square (special case with a = b), this becomes 4a.
Keep practising Mensuration: Perimeter and Area
Browse all Mensuration: Perimeter and Area questions for CBSE Class 9, or explore more Mathematics topics.
Related questions
Match Heron's formula components for triangle area:Match each hemisphere surface area component (radius r):Match each circular solid with its volume formula:Match each circular 3D solid with its curved surface area (CSA) formula:Spot the one that does not fitFill the gaps on surface areasFind a cone's curved surfacePart of a cone or a sphere