∫ AD ∨ BC,

∴∠DAM=∠N,∠D=∠MCN，

Point m is the midpoint of the edge CD,

∴DM=CM，

∴△ADM≌△NCM(AAS)，

∴CN=AD=3,AM=MN= 12AN，

∴BN=BC+CN=5+3=8，

∫∠ABC = 90 °,

∴S△ABN= 12×AB？ BN= 12×4×8= 16，

∴s△abm= 12s△abn=8；

∴△ABM has an area of 8;

(2) the intersection m is MK⊥BC,

∫∠ABC = 90 °,

∴MK∥AB，

∴△NMK∽△NAB，

∴MKAB=MNAN= 12，

∴MK= 12AB=2，

In Rt△ABN, AN=AB2+BN2=42+82=45,

∴BM= 12AN=25，

At Rt△BKM, SIN ∠ MBC = mkbm = 22, there are praises and treads. What's your comment on this answer? Comments: If your problem has not been solved, please describe your problem in detail and conduct free professional consultation through Baidu Legal Pro. Other similar problems 2016-12-01(2013? As shown in the figure, in trapezoidal ABCD, AD∨BC, AB=CD, BC = 2ad. Germany ⊥ BC, the vertical foot is point F, and F is the midpoint of Germany142018-03-165438+. As shown in the figure, in trapezoidal ABCD, AD∨BC, AB=CD=BC=6, and AD = 3. Point m is the midpoint of side BC, and m is the vertex of ∠EMF720 10-07-25 as shown in the figure: in trapezoidal ABCD, ABCD. Then the line segment Mn = 572011-08-11. As shown in the figure, in trapezoidal ABCD, AB is parallel to CD, AB = 2cd.m, and N is the midpoint of diagonal AC and BD respectively. Let the circumference of trapezoidal ABCD be L162011-10-13. As shown in the figure, it is known that in trapezoidal ABCD, AD∨BC and M.N are the midpoint of AB. The third model in Minhang district where CD, NE∨DM and BC intersect at point E is known as follows: As shown in the figure, in right-angled trapezoidal AB∨CD, ∠ ADC = 90, point E is on the side of BC, and point F is on diagonal AC, 320 13-04-2 1, as shown in the figure. As shown in the figure, in trapezoidal abcd, ABCD, ∠ A = 90, AB=3, CD=6, and the intersection of BE⊥BC is at point E. When ad .( 1) recommends 2 for you, F.context('cmsRight') is especially recommended. [{ ' URL ':'/d 0 1373 f 082025 AAF 5 1 1aa 256 e 9 edab 64034 f 1a 07？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId':'A24KA00562 '，}，{ ' URL ':/s？ word = % E6 % AC % A7 % E6 % B4 % B2 % E6 % 9D % AF & sa = searchpromo _ ozb _ zhidao _ tuijian '，' src ':'/3 BF 33 a 87 e 950352 AAF 5 df 4954 143 fbf2b 2 1 18 b6b？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId ':' '，}])； The price of electric cars has dropped many times. Is the quality guaranteed? What impact will the "network toilet" have? Is Huaqiang North's second-hand mobile phone reliable? Why is the cost of cancer treatment getting higher and higher? I recommend f.context ('recbrand', [{"img": "\/86D6277F9E2F07083523F69DFB 24B 899A901F20d? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto "，" url":"/hm.js？ 6859 ce 5a af 00 FB 00387 e 6434 E4 FCC 925 "； var s = document . getelementsbytagname(" script ")[0]； s.parentNode.insertBefore(hm，s)； })(); window . TT = 1720 127355；