There is a vegetable field with an area of 192m2, which can be divided into a parallelogram and a right triangle (as shown in the figure). It is known that the two right sides of the right triangle are 12m. What is the width (H) of the parallelogram vegetable field?

(192-12 × 12 △ 2) △ 12, = (192-144 △ 2) △ 12, = (192-72) △ 12, = 120 △ 12, = 10 (m); answer: the width (H) of parallelogram vegetable field is 10 m

Among the following phenomena, the one that belongs to translational phenomenon is
A steering wheel rotation
B the movement of the wheels of a running bicycle
C lift up and down
Motion of d-pendulum

Except for C, everything else is rotating

If the order of keys is (-), 5, the Y power of X, 3, +, 2, = then the result is?

(-5)³+2=-125+2=-123

Let a be n * m matrix, B be m * n, n

n=r(I)=r(AB)

As shown in the figure, in △ ABC, ab = AC, ad is the angular bisector, e is a point on the ad extension line, CF ‖ be intersects ad at point F, connecting BF and CE. Is the quadrilateral becf a diamond? Please give reasons

It is proved that: ∵ AB = AC, ad is angular bisector, ∵ BD = CD, ∵ CF ‖ be, ∵ DBE = ∵ FCD, in △ CDF and △ BDE, ∵ DBE = fcddb = CD ≌ BDE = CDF, ≌ BDE ≌ CDF (ASA), ? CF = be, then ? CF ‖ be, then ? quadrilateral bfce is parallelogram; ∵ AB = AC, D is the midpoint of BC, ? ad ⊥ BC, then ≌ quadrilateral bfce is parallelogram, and ≌ quadrilateral bfce is rhombohedron Shape

If the function f (x) = | 4x-x ^ 2 | - A has three zeros, then a
If f (x) = the zero of the square of 4x-x-a
If the number of dots is 3, then a = I know the final answer is 4

The starting point of this problem is the image of | 4 * x-x ^ 2 |
First draw the image of 4x-x ^ 2, and then turn up the function image in the lower half of the x-axis with the x-axis as the symmetry axis to get another function image
Then a straight line parallel to the X axis is used to cut the function. If there are three intersections between the line and the function, the coordinates of the intersection of the line and the Y axis are the values of A

Using space vector to calculate line and surface angle
I want to ask if it is the sine of line surface angle. Just add the sign of absolute value to that formula

That's right

In triangle ABC, AE, ad and ah are bisector, middle line and high line of angle respectively. What is the big line relationship of angle a = 90?

① When B = C = 45 °, AE = ad = ah
② When B ≠ C, ad > AE > ah

40.32 divided by X + 15 = 22.2 64.9 divided by x-55 = 0.9 201.25 divided by X + 18 = 26.75 184.5 divided by X-9 = 3.3 all the solving process

①40.32÷x＋15＝22.2 ②64.9÷x－55＝0.940.32÷x＝22.2－15 64.9÷x＝0.9＋55x＝40.32÷7.2 x＝64.9÷55.9 x＝5.6 x＝649/559③201.25÷x＋18＝26.75 ④184.5÷ x－9＝3.3201.25÷x＝26.75－18 184.5÷x＝3.3＋9x...

If a (1,2) and B (- 3,1) are known, then the vector coordinates obtained by translating the vector AB according to the vector (- 1,2)?

A vector, no matter how translational, its coordinates are unchanged
Therefore, the coordinates after translation are still (- 3-1,1-2) = (- 4, - 1). (only the coordinates of points a and B are changed.)

There is a vegetable field with an area of 192m2, which can be divided into a parallelogram and a right triangle (as shown in the figure). It is known that the two right sides of the right triangle are 12m. What is the width (H) of the parallelogram vegetable field?