ElectricalMath
Region: AE
Monday 12 January 2026 17:33:32 GMT
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112221 :
i used tangent secant theorem 12²=8(8+2r) 8+2r=18 2r=10 r=5
2026-01-13 14:56:21
10
jr6560879 :
My first thought: What if it’s a 5-12-13 triangle? Bingo! So r=5.
2026-01-13 23:24:03
8
D7m :
144 + r² = ( 8+r )² r = 5
2026-01-13 03:46:01
3
Frank :
it reeks of 5 12 13, 3 seconds to double check and ready
2026-03-02 11:56:45
0
polizei deutschland :
r = 3. Square side is 8, and triangle area is 12, so (1/2)(8)(r)=12. Basic geometry.
2026-04-11 15:03:57
0
Patrick Munyai :
You must specify A = 12 sq cm
2026-01-16 15:34:11
4
Yuriy975 :
(r+8)^2=r^2+144, r=5
2026-01-13 13:40:54
2
Indestinate :
sqrt(12^2 + x^2) = 8+x
2026-03-10 10:51:06
0
Precision_Engineer :
Found it. It's in the bottom right of the circle.
2026-03-11 04:25:17
0
𝙨𝙖𝙞𝙛𝙛𝙮𝙮𝙥𝙤𝙤𝙥𝙤𝙮 :
You put 12 cm^2
2026-01-13 00:36:14
1
Tom from Yacubia ☭ 🇵🇸 :
5
2026-03-09 02:05:45
1
M.A.Maths :
If the triangle has area of 12 sq cm, then the solution to ‘r’, is the solution to the cubic r^3+4r^2-36=0 or r = 2.376 (3 d.p.)
2026-01-13 10:44:31
1
Biso1891 :
Pitagoras: 144=64+16*r, so r=80/16=5
2026-01-13 21:26:06
3
mrroni_rm :
r = 5
2026-01-13 00:19:55
1
myozotis :
r=5 cm
2026-01-13 00:06:28
0
yallah malishka. JW :
no
2026-01-13 05:05:43
0
TheMadCyclist :
5. Took about 5 seconds, spent longer checking it! Nice question tho 👏
2026-01-14 19:47:32
0
Patrick Munyai :
And you said solve with no pen and paper, you are misleading
2026-01-16 15:38:20
1
:
12 ^ 2 - 8 ^ 2 =80 square root
2026-05-17 18:48:42
0
_wardy_ :
8
2026-04-16 14:39:01
0
silvolivi :
5 without any calc
2026-04-06 05:13:45
0
gergelyhrepka :
5
2026-03-07 21:39:45
0
❤️ 😍 :
5 cm
2026-03-06 21:02:56
0
GeauxFYTT :
R=5
2026-03-03 14:23:48
0
Ndyebo :
Wow great
2026-01-13 00:31:58
0
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