2006-12-06 10:26:15 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
half circle 's perimeter =half of perimeter of circle + diameter
= pi* (50/2)+50
now calculate urself
2006-12-06 10:32:57 · answer #1 · answered by niel_alinda 3 · 0⤊ 0⤋
The perimeter of a half circle would be the "round" part (which is half the circumference) plus the straight part.
The circumference of the full circle is calculated using the formula
C = pi*d = 50pi
Therefore, half the circle would be
1/2 C = 1/2 50pi = 25pi
The straight part is just, simply, the diameter. So your total perimeter P is
P = (round part) + (straight part)
P = 25pi + 50
2006-12-06 10:29:46 · answer #2 · answered by Puggy 7 · 0⤊ 0⤋
Perimeter of a circle =π⋅d
so P=50⋅π⋅m ≈ 157m
2006-12-06 10:39:03 · answer #3 · answered by rm 3 · 0⤊ 0⤋
Multiply by pi, which would give you the circumference of the whole circle. Since you have only a half circle, divide the result by 2.
2006-12-06 10:28:53 · answer #4 · answered by Anonymous · 1⤊ 0⤋
perimeter of half circl is pir+d
3.14*25+50
=128.5m
2006-12-06 10:28:58 · answer #5 · answered by raj 7 · 0⤊ 0⤋