PLEASE HELP!...WILL MEDAL AND FAN)))) Using 𝑑 to represent the diameter of the circle, write an algebraic equation that will result in the perimeter of a semicircle.

Question

mathmale · Answer

1.  Find the radius of the circle.  It's half the diameter.  Express the radius in terms of d.
2.  Find the circumference of the circle, in terms of d.
3.  Write the formula for the perimeter    of a semi- or half-circle.  
     a) not including the diameter
     b( including the diameter, d

foxythepirate0984 · Answer

attachment

foxythepirate0984 · Answer

@ParthKohli

foxythepirate0984 · Answer

someone help D:

foxythepirate0984 · Answer

@mathmale  I dont get what you mean @TheSmartOne help

john_es · Answer

Do you know what is the formula for the length of a circle?

john_es · Answer

If r is the radius of the circle, the length L of a circle is$$L=2\pi r$$

john_es · Answer

Or you can rewrite this as$$L=\pi 2 r$$

john_es · Answer

You know that the diameter is d=2r, so how would you express now the length of a full circle in terms of d?

john_es · Answer

Well, you can rewrite it as
$$L=\pi d$$
And now, you can calculate the length l of the half circle,
$$l=L/2=\pi d/2$$ And this is the answer.