I'm trying to get the radius of the arch of a door?
2006-07-17 17:26:16 · 13 answers · asked by Chris B 1 in Science & Mathematics ➔ Engineering
Since a semi-circle is just half of a circle, find the center of the base of your semi-circle. Once you have the center, measure the distance from the center point to the edge of the semi-circle. That is your radius.
2006-07-17 17:30:09 · answer #1 · answered by icehoundxx 6 · 0⤊ 1⤋
The radius will be the full length of the door if the door will swing around a full 180 degrees which would be a semi circle or else it would be a quarter circle and the radius would still be the length of the door
2006-07-18 09:49:39 · answer #2 · answered by Aaron G 2 · 0⤊ 0⤋
The radius is 1/2 the diameter
The diameter is Pi times the raduis divided by 2
(3.14 R)/2
2006-07-18 00:32:11 · answer #3 · answered by David T 4 · 0⤊ 0⤋
measure the width of the door, then divide by two should give you the radius of the semi-circle at the top
2006-07-18 00:30:02 · answer #4 · answered by MstrChief55 5 · 0⤊ 0⤋
the area formula for a full circle is pie(3.14)*r*r so if it is semicircle
area is (3.14*r*r)/2
so radius is r*r=(2*area)/3.14
so if you know area you can find radius..
..in case of door arch just measure the base diameter and divide by 2
note:in case of full or semi circle radius is the same...
2006-07-18 01:22:23 · answer #5 · answered by sujith 1 · 0⤊ 0⤋
If it is a semi circle, the radius is half it's width - the width is the diameter.
2006-07-18 00:30:51 · answer #6 · answered by confused 2 · 0⤊ 0⤋
The radius should be half the width of the door.
2006-07-18 00:29:48 · answer #7 · answered by arbeit 4 · 0⤊ 0⤋
There is no radius for semi circle.
2006-07-18 00:33:16 · answer #8 · answered by sa 7 · 0⤊ 0⤋
HUH? The radius is half of the circle.
2006-07-18 00:30:30 · answer #9 · answered by Candi H 3 · 0⤊ 0⤋
C = 2 pi r
Therefore r = C divided by 2 pi
2006-07-18 00:31:17 · answer #10 · answered by shelley p 1 · 0⤊ 0⤋