Equilateral Triangle

Triangle equilateral:
Find area and perimeter of a square whose side is 7.5 cm.

Solution:

Side of the square, a = 7.5 cm

Area of the square, A = a²

= a × a

= 7.5 × 7.5

= 56.25cm²

Perimeter of the square, P = 4a

= 4 × 7.5 cm

= 30 cm

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