Question

I don’t know what I’m doing

Answer 1

29.12 square cm

Explanation:

Area of equilateral triangle:

Side = a = 8.2 cm

`\boxed{\bf Area \ of \ equilateral \ triangle = (√(3))/(4)a^2}`

`\sf = (√(3))/(4)*8.2*8.2\\\\= √(3)*4.1 * 4.1\\\\= 1.732 * 4.1 *4.1\\\\= 29.12 \ cm^2`