Given the square ABCD and the isosceles right triangle bef, place the point F on BC according to figure 1, take the midpoint g of DF, and connect eg and CG (1) Explore the quantitative relationship between eg and CG, and explain the reason; (2) turn △ bef in figure ① clockwise 45 ° around point B to get figure; (2) connect DF, take the midpoint g of DF, and ask whether the conclusion in (1) is valid, and explain the reason; (3) turn △ bef in figure ① at any angle around point B (the rotation angle is between 0 ° and 90 °) to get figure; (3) connect DF, take the midpoint g of DF, and ask the knot in (1) On whether it is tenable, please give reasons

Given the square ABCD and the isosceles right triangle bef, place the point F on BC according to figure 1, take the midpoint g of DF, and connect eg and CG (1) Explore the quantitative relationship between eg and CG, and explain the reason; (2) turn △ bef in figure ① clockwise 45 ° around point B to get figure; (2) connect DF, take the midpoint g of DF, and ask whether the conclusion in (1) is valid, and explain the reason; (3) turn △ bef in figure ① at any angle around point B (the rotation angle is between 0 ° and 90 °) to get figure; (3) connect DF, take the midpoint g of DF, and ask the knot in (1) On whether it is tenable, please give reasons

(1) Eg = CG. Prove: ∵ def = ∠ DCF = 90 °, DG = GF, ∵ eg = 12df = CG. (2) (1) the conclusion holds, that is eg = CG. Prove: through point F as a parallel line of BC, intersect the extension line of DC at point m, connect mg. ∵ EF = cm, it is easy to prove that the quadrilateral efmc is a rectangle. ? EFG = ∵ GDM G ≌ △ CMG. ≌ eg = CG. (3) holds. It is proved that: take the midpoint h of BF, connect EH and GH, take the midpoint o of BD, connect og, OC. ∵ ob = OD, ∠ DCB = 90 °, CO = 12bd. ∵ DG = GF, BH = HF, OD = ob, ∵ GH ∥ Bo, GH = 12bd; og ∥ BF, og = 12bf. ∵ co = GH. ∵ bef is an isosceles triangle, eh = 12bf. ? eh = og. ? Hg is a parallelogram, ∴∠BOG=∠BHG．∵∠BOC=∠BHE=90°，∴∠GOC=∠EHG．∴△GOC≌△EHG．∴EG=GC．

Given the square ABCD and the isosceles right triangle bef, place the point F on BC according to figure 1, take the midpoint g of DF, and connect eg and CG
(1) Explore the quantitative relationship between eg and CG, and explain the reason; (2) turn △ bef in figure ① clockwise 45 ° around point B to get figure; (2) connect DF, take the midpoint g of DF, and ask whether the conclusion in (1) is valid, and explain the reason; (3) turn △ bef in figure ① at any angle around point B (the rotation angle is between 0 ° and 90 °) to get figure; (3) connect DF, take the midpoint g of DF, and ask the knot in (1) On whether it is tenable, please give reasons

(1) The conclusion in (2) (1) holds, that is, eg = CG. It is proved that the quadrilateral efmc is a rectangle when it passes through point F as a parallel line of BC, intersects the extension line of DC at point m, and connects mg. EF = cm

As shown in the figure, the edges AB and BC of square ABCD are on the be and BF sides of triangle bef respectively, and the vertex D is on the EF side. Point d divides EF into two segments, de = 12M, DF = 15m, and calculates the area sum of two shadow triangles

According to the analysis, the answer is as follows: 12 × 15 △ 2 = 90 (square meters); answer: the sum of the area of two shadow triangles is 90 square meters

As shown in the figure, the quadrilateral ABCD is a square, the triangle bef is an isosceles right triangle, and the point P is the midpoint of De, connecting PC and PF
Rotate triangle bef clockwise a ° around point B (0

&It is proved that extending FP to G makes PG = PF, connecting DG, GC, FC, extending EF intersect BD to N, as shown in the figure, ? point P is the midpoint of De, ≌ PDG ≌ PEF, ≌ DG = EF = BF. ≌ PEF = ≌ PDG, ≌ en ∥ DG, ≂ bne = ∥ BDG = 45 ° + ≁ CDG = 90 ° - ≌ NBF = 90 ° - ≌ FBC =

What does BV-2 * 2.5 + bvr-1 * 2.5-pc20-wc mean in the electrical system diagram?

BV-2*2.5+BVR-1*2.5-PC20-WC
BX, BV, BLV, BVV, RVV, BVR, etc. all represent conductors, and the letters in the model represent respectively:
(1) The first letter "B" indicates wiring
(2) The second letter "X" stands for rubber insulation, "V" stands for PVC insulated wire
(3) The third letter "V" stands for the plastic sheath
(4) Model without "L" for copper wire, with "L" for aluminum wire
(5) "R" means flexible cord
2 * 2.5 = number of pieces * square number of single piece (mm 2)
PC laying through rigid plastic pipe 20 is the diameter of the rigid plastic pipe, the unit is mm
WC concealed laying in the wall
You can refer to the national standard atlas "00dx001" building electrical engineering design commonly used graphics and text symbols on page 74
Need atlas can contact me, leave email or Baidu Hi I can

In the power distribution system diagram: sdx2-63-c16a / 1p zrbv-3x2.5 kbg20 WC, CC 0.5KW, 1 # PE = 63.84kw, KX = 0.85 cos & # 8709; = 0.85
Pjs=54.26KW Ijs=96.99A

Sdx2-63-c16a / 1p = miniature circuit breaker 63 frame structure, 16 Amp single circuit switch for lighting. Zrbv-3x2.5 plastic hard copper three 2.5mm square wires. 0.5KW = 500W power 1 # = No.1 PE = 63.84kw = design power equal to 63.84kw, KX = 0.85 = set constant, cos & # 8709; = 0.85 = power factor equal to 0.85. PJs = apparent power IJs = apparent current. Please forgive me for the mistakes and omissions

WDZ-BYJ(F)-3X2.5 PC20

A kind of three strand wire, the letter in front of it indicates the wire skin, which can be used in corrosive environment. It is a 3-strand wire of 2.5 square mm. It needs to pass through a steel pipe with an outer diameter of 20 mm or be buried in the wall after passing through the pipe

Wdzn-byj-0.45/0.75-3x2.5-ct/sc20-cc/wc on the electrical construction drawing, is this cable or wire? It's good to have a drawing

Wire!
WDZN-BYJ-0.45/0.75-3x2.5
Copper conductor XLPE insulated halogen-free low smoke flame retardant fixed laying wire, rated voltage 450 / 750V, 3 pieces, 2.5mm & # 178;
CT: laying along the bridge or tray
Sc20: the cable is laid through steel pipe with diameter of 20 mm;
CC: concealed in the roof or ceiling;
WC: concealed laying in the wall

zrbv-3x2.5+e2.5 kbg20/ct

Z: Represents flame retardant, R: represents flexible wire, BV: represents copper core wire, 3x2.5: represents three 2.5 square wires, 1x2.5: represents one 2.5 square wire,

C65n / 3P 25A in circuit diagram
COS∅=0.9
VV22-4*35-SC70-FC NC100H/4P 80A
C65N/3P 25A BV-5*6-SC25-WC N1
What do these mean?

Cos & # 8709; = 0.9 means the power factor is 0.9
Vv22-4 * 35-sc70-fc refers to the laying of vv22-4 * 35 cable through pipe
Bv-5 * 6-sc25-wc N1 refers to the laying of bv-5 * 6 cable through pipe
Nc100h / 4P 80A is Schneider Electric miniature circuit breaker, nc100 is model, h is breaking capacity code (10kA), 4P is four pole, 80A is rated current (setting current) of release
C65n / 3P 25A is Schneider Electric miniature circuit breaker, C65 is model, n is breaking capacity code (6ka), 3P refers to three pole, 25A refers to rated current (setting current) of release