In square ABCD, e is any point on CD, connecting be, taking be as hypotenuse, making isosceles right triangle bef inside the square, connecting AF Verify de = root 2AF

In square ABCD, e is any point on CD, connecting be, taking be as hypotenuse, making isosceles right triangle bef inside the square, connecting AF Verify de = root 2AF

Connecting ad, ∵ ABCD is a square, ∵ abd = 45 ° and DB / AB = √ 2; ∵ △ bef is an isosceles right triangle, ∵ EBF = 45 ° and be / BF = √ 2, then ∵ DBE = 45 ° - ∵ FBD = ∠ ABF; in △ DBE and △ ABF, the two sides of equal angle, DB / AB = be / BF = √ 2, ∵ DBE ∵ ABF, de / AF = dB / AB =

If the area of the triangle formed by the line y = 2x + B and the two coordinates is 4, the function formula is_____ .

The linear equation is y = 2x + B. when x = 0, y = B, the distance from the intersection of image and Y axis to the origin is | B | when y = 0, 2x + B = 0, x = - B / 2, the distance from the intersection of image and X axis to the origin is | - B / 2 |, that is, the lengths of two right angles of right triangle are | B |, | - B / 2 | (1 / 2) × | B | × | - B / 2 | = 4 | B & sup2 / / 4 = 4, B & SU

Given that y is in positive proportion to X-2, and when x = 1, y = 4, find: (1) the functional relationship between Y and X; (2) draw the function image in the coordinate system and find out the area of the triangle surrounded by the image and the coordinate axis

(1) Let the relation between Y and X be y = K (X-2), and substitute (1,4) into the analytic expression to get k (1-2) = 4, and the solution is k = - 4. So the analytic expression of the function is y = - 4x + 8; (2) when x = 0, y = 8, when y = 0, x = 2, so the intersection of the function and the coordinate axis is (0,8), (2,0). As shown in the figure: s △ ABO = 12 × 2 × 8 = 8

The specific meaning of wg-63a / 3P? The specific meaning of c65n-c16 / 1pzr-bv-3 × 2.5 SC15 WC CC?

WG - miniature circuit breaker product model, Schneider Vango;
63A / 3P --- rated current 63A, 3 poles;
C65n - miniature circuit breaker product model, Schneider;
C16 / 1p --- rated current 16a, 1 pole;
Zr: flame retardant;
Bv - copper core PVC insulated wire;
3 × 2.5 ------ 3 wires with core section of 2.5 square mm;
SC15 - steel pipe with nominal diameter of 15mm;
WC - concealed in the wall;
CC --- concealed in the ceiling;

SC15 WS WC CE CC hsm8-63c / 3P CT w (f) C dtq30-32 / 2p on electrical drawing

The following is my collection of electrical design and construction drawings in common line laying: SR: laying along the steel trough be: laying along the roof truss or across the roof truss cle: laying along the column or across the column we: laying along the wall Ce: laying along the ceiling surface ace: laying in the ceiling that can enter BC: laying in the beam CLC: laying in the

Distribution system diagram bvv-500 (2x2.5) in CAD WC.CEC And zr-bvv-500 (2x4 + 1x2.5) WC.CEC What does it mean?
BVV-500(2x2.5) WC.CEC
ZR-BVV-500(2x4+1x2.5) WC.CEC
What do they stand for

The first is to make two 2.5 square copper wires
The second is to say that plastic copper wire two 4 square + with a 2.5 square

zr-bvv-500(3*2.5) WC.cec What is the parameter of 500 in?

What does zr-bvv mean

Zr means flame retardant
BVV -- B is wiring, V is PVC, two V, one is insulation, one is sheath
For example, zrbv-3x2.5 is actually three wires. Zrbv-3x2.5 is a sheath with three wires inside, which is one wire in appearance
Zrbvv refers to flame retardant copper core PVC insulated PVC sheathed round sheathed wire

ZR-RVS-2*0.5 SC15 FC WC

It is the cable model, and the laying method Zr - Flame Retardant RVs - twisted multi strand flexible wire 2 * 0.5, diameter SC15 - equipped with DN 15 threading pipe and laying method FC concealed laying in the ground, WC concealed laying in the wall

What is zr-bvv-25mm?

The model of the cable indicates that zr-bvv-25mm is not the correct mark, and the correct mark should be zr-bvv-25mm & # 178;, representing flame retardant PVC insulated 25mm2 copper wire