Find the area of an equilateral triangle whose side is 15.21 units long. Round off your answer to two decimal places

my answer is 100.17
but the computer says wrong tried 100.1749 (4 decimal places) still wrong

from the equation sqrt3/4 (s)^2

where did i go wrong?

Question

Find the area of an equilateral triangle whose side is 15.21 units long. Round off your answer to two decimal places

my answer is 100.17
but the computer says wrong tried 100.1749 (4 decimal places) still wrong

from the equation sqrt3/4 (s)^2

where did i go wrong?

solomonzelman · Answer

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solomonzelman · Answer

can you find the base of each triangle?

anonymous · Answer

that would be half of 15.21 which is 7.605

anonymous · Answer

so the answer is100.15?