Question

Can anyone help me to find the answer to this ❓

Answer 1

A=πr2

=π(2/3 √3/4dc+1/2dc)2

Using the formula (a+b)2=a2+2ab+b2(a+b)2=a2+2ab+b2, we can expand:

A=π(4/6⋅3/4d2c +4/3⋅ √3/4 ⋅ 1/2d2c+14d2c)

=π(1/2d2c + 2/3 ⋅√3/4 d2c+1/4d2c)

=π(3/4d2c+2/3 ⋅√34d2c)

≐4.169993854 in2

≐4.170 in2