Question

Pls help me I don’t get it

Answer 1

15.71 cm

Explanation:

remember the formula for the circumference of a circle but make it half since it's a semi-circle

the perimeter of a circle is diameter x pi

since

the diameter is 10 and pi is 3.142

its 10 x 3.142

and that equals

31.42

that's a FULL circle so half of that

divide it by 2

31.42/2=15.71

so the diamater of the semi-circle is 15.71

hope this helps!

dont forget is centimeters

Answer 2

15.71cm

Explanation:

perimeter of a semi circle=1/2(πdiameter)

1/2(3.142×10cm)

1/2(31.42cm)

15.71cm