Tõhela järv asub Pärnumaa loodeosas Pärnu linna põhjas. Järve loodeosast saab alguse Paadrema jõgi.
Selle pindala on 407 ha, suuruselt on järv Eestis kümnes. Tõhela järve keskmine sügavus on 1,3 m, 
suurim pikkus on 3 km ja laius 2 km. Järve sügavus läänekaldalt järsult suureneb; seal on selle põhi 
mudane. Idaosas on Tõhela järv madal ja selle põhi on liivane. Ida- ja põhjakaldad on kaetud savika 
moreeniga, lääne- ja lõunakaldad soosetetega. Vesi on rohekaskollane ja hästi läbipaistev. Tõhela järv 
sisaldab olulisi mudavarusid. Tõhela järv oli aastatel 1946–1948 Vene sõjaväe õppepolügoon. Sellest 
ajast on pommid ja mürsud veel praegugi järve põhjamudas.
Tõhela järve idakaldad on ligipääsetavad ja sobivad suplemiseks. Liivane kallas on hea puhkamiskoht.
(Allikas: et.wikipedia.org/wiki/Tohela_jarv

Tõhela järv

A = (0, 0)
B = (2.6961246612466088, 0.003821138211383269)
C = (0.08756097560975354, 0.1515718157181582)
D = (0.586856368563683, 0.14647696476964872)
f = Segment(C, D)
E = (1.188048780487802, 2.969024390243901)
F = (1.040298102981027, 2.907886178861787)
G = (0.9434959349593467, 2.760135501355012)
H = (0.9333062330623277, 2.6225745257452564)
I = (1, 2.5)
J = (0.9791598915989131, 2.3780216802168015)
K = (0.8976422764227614, 2.3168834688346873)
L = (0.8059349593495907, 2.3270731707317065)
M = (0.7447967479674769, 2.449349593495934)
N = (0.6530894308943062, 2.321978319783197)
O = (0.6123306233062303, 2.1640379403794032)
P = (0.7397018970189674, 2.1436585365853653)
Q = (0.7804607046070433, 2.0621409214092137)
R = (0.724417344173439, 1.9959078590785901)
S = (0.7295121951219484, 1.9042005420054195)
T = (0.6785636856368537, 1.781924119241192)
U = (0.6327100271002682, 1.6086991869918696)
V = (0.71422764227642, 1.5220867208672086)
W = (0.7855555555555528, 1.3947154471544716)
Z = (0.9384010840108372, 1.41)
A_1 = (1.0046341463414605, 1.262249322493225)
B_1 = (1.0046341463414605, 1.0635501355013552)
C_1 = (1.0555826558265553, 0.9157994579945803)
D_1 = (1.1829539295392926, 0.8088075880758813)
E_1 = (1.3408943089430863, 0.6406775067750684)
F_1 = (1.4937398373983708, 0.5897289972899735)
G_1 = (1.590542005420051, 0.6559620596205968)
H_1 = (1.7433875338753355, 0.6304878048780495)
I_1 = (1.8401897018970157, 0.742574525745258)
J_1 = (1.9217073170731673, 0.8648509485094855)
K_1 = (1.9318970189701863, 0.9667479674796752)
L_1 = (2.110216802168018, 0.9259891598915992)
M_1 = (2.2172086720867172, 0.8954200542005424)
N_1 = (2.2936314363143597, 0.8139024390243907)
O_1 = (2.436287262872625, 0.8444715447154476)
P_1 = (2.5, 1)
Q_1 = (2.48723577235772, 1.4150948509485095)
R_1 = (2.4260975609756064, 1.547560975609756)
S_1 = (2.456666666666663, 1.685121951219512)
T_1 = (2.359864498644983, 1.8583468834688344)
U_1 = (2.273252032520322, 2.0723306233062324)
V_1 = (2.1458807588075848, 2.133468834688346)
W_1 = (2.1509756097560944, 2.3168834688346873)
Z_1 = (2.125501355013547, 2.4442547425474244)
A_2 = (2.0388888888888856, 2.617479674796747)
B_2 = (1.9726558265582623, 2.704092140921408)
C_2 = (1.9115176151761484, 2.775420054200541)
D_2 = (1.8656639566395632, 2.989403794037939)
E_2 = (1.89623306233062, 3.126964769647695)
F_2 = (1.7230081300812976, 3.198292682926828)
G_2 = (1.570162601626013, 3.27471544715447)
H_2 = (1.4071273712737096, 3.2849051490514887)
I_2 = (1.3001355013550107, 3.106585365853657)
hulknurk1, e, f_1, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, z_1, a_1, b_1, c_1, d_1, e_1, a, g_1, h_1, i_1, j_1, k_1, l_1, m_1, n_1, o_1, p_1, q_1, r_1, s_1, t_1, u_1, v_1, w_1, b, a_2, b_2, c_2, d_2, e_2, f_2, g_2, h_2, i_2 = Polygon(E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, Z, A_1, B_1, C_1, D_1, E_1, F_1, G_1, H_1, I_1, J_1, K_1, L_1, M_1, N_1, O_1, P_1, Q_1, R_1, S_1, T_1, U_1, V_1, W_1, Z_1, A_2, B_2, C_2, D_2, E_2, F_2, G_2, H_2, I_2)
c = Perimeter(hulknurk1)
J_2 = (2.777642276422759, 0.011463414634147573)
K_2 = (5.330162601626011, 0.0140108401084022)
Ruumala: (hulknurk1 * 1.3)
tekst3: "Järve pindala mõõtmisel hulknurgatööriista abil tuli väärtuseks " + hulknurk1 + "km². Wikipedia annab tutvustavas
 tekstis järve pindalaks 407ha, andmete blokis 3,21km².  Kalapeedia  esitab pindalana 3,17km². 
Järve keskmine sügavus on 1,3m, seega järvevee ruumala V=" + hulknurk1 + "*1,3=" + Ruumala + " km²"