Put a square iron block 8 cm long into a rectangular container 2 decimeters long and 1.6 decimeters wide with water How many centimeters will the water surface rise if the iron block is completely submerged and the water does not overflow

Put a square iron block 8 cm long into a rectangular container 2 decimeters long and 1.6 decimeters wide with water How many centimeters will the water surface rise if the iron block is completely submerged and the water does not overflow

Length 2 decimeter = 20 cm, width 1.6 decimeter = 16 cm
The water surface will rise = 8 × 8 × 8 / (20 × 16) = 1.6cm

A cuboid container is 10 cm long, 8 cm wide and 20 cm high. It contains water with a depth of 15 cm. It is completely immersed in an iron ball. The water surface rises by 3 cm. What is the volume of the iron ball?

10 × 8 × 3 = 80 × 3 = 240 (cubic centimeter) a: the volume of this iron ball is 240 cubic centimeter

In a cuboid container 12 decimeters long and 8 decimeters wide, an iron ball is submerged, and the water surface rises by 2 cm. What is the volume of the iron ball cubic decimeters?

Volume = 12 × 8 × 0.2 = 19.2 cubic decimeter

Given that the coordinates of ABC vertex of triangle are a (0,0), B (1,1), C (4,2), the equation of circumscribed circle of triangle ABC is obtained

Let the center of the circle be o (x, y), the midpoint D of AB, and the midpoint e of AC: then the coordinates of D are (1 / 2,1 / 2), the coordinates of E are (2,1), OD ┻ AB, OE ┻ AC, the slope of AB is (1-0) / (1-0) = 1, the slope of OD is - 1, and the equation of OD is: let y = - x + A, substitute (1 / 2,1 / 2), a = 1, and the equation of OD is y = - x + 1; the slope of AC is

Take charge of, in charge of, take the charge
Urgent need to take charge of, in charge of, take the charge of problem supplement: take charge of, in charge of, take the charge of, in the charge of usage difference!

Take the charge of: emphasizes the action of "in charge of" and the process of obtaining the power of the supervisor. In charge of: relative to the previous one, it focuses on the state of the supervisor

The sum of numerator and denominator of a simplest fraction is 86. If 9 is subtracted from both numerator and denominator, the resulting fraction is 89, then the original fraction is 89______ ．

The sum of the numerator denominator of the new fraction is: 86-9 × 2 = 68; the denominator of the original number is: 68 × 9 ^ (9 + 8) + 9, = 612 ^ 17 + 9, = 36 + 9, = 45; the numerator of the original number is: 86-45 = 41; the original fraction is: 4145

Divide the following words into absolute open syllable, closed syllable and relative open syllable!
Late bad lamp name plan he pen yes she these well like nice sit mill wish sick no joke long fog son use cute sun but put to do

He, she, no, to, do
Late, name, these, like, nice, Joe, use, cut,
Close: bad, lamp, plan, pen, yes, well, sit, mill, wish, sick, long, fog, son, sun, but, put,

Finding vector: (OA + AO) + AD + DC

=Ac

How to say this phrase in English

practise this sentence

As shown in the figure, in square ABCD, G is any point on BC (point G does not coincide with B and C), AE ⊥ DG, CF ⊥ Gd, and the perpendicular feet are e and f respectively
(1) Find a pair of congruent triangles in the figure and explain the reason;
(2) It means AE = FC + EF
The graph is a square. Find a point G on BC and connect it with D. make AE and CF perpendicular to GD
It's due tomorrow!

All △ AED is equal to △ DFC
prove:
A quadrilateral ABCD is a square
∴AD=DC
∠ADC=90°
∴∠ADE+∠FDC=90°
∵AE⊥GD,∴∠DAE+∠ADE=90°
∴∠FDC=∠DAE
∵CF⊥GD
∴∠CFD=∠DEA=90°
The results show that ∧ AED is equal to ∧ DFC (AAS);
（2）
∵△ AED is equal to △ DFC
∴DE=CF
AE=DF=DE+EF=FC+EF