How to find the intersection of two planes

How to find the intersection of two planes

First determine two lines on a plane, find the intersection of two lines and another plane, and then connect the two intersections to get the intersection of two planes

How many lines are there at the intersection of two planes?

But according to the PEP senior high school textbook, the two sides that are not specially explained refer to the non overlapping sides, so they are excluded
Axiom 2: if two non coincident planes have intersection points, then the set of their intersection points is a straight line, (definition) is called their intersection line - note that here is the definition, for two determined planes, there can only be one intersection line at most
If there is no intersection, then the two planes are parallel and naturally there is no intersection
So the answer is 0 (two planes parallel) or 1 (two planes intersect)
This is the case in Euclidean space. For non Euclidean geometry, the case may be different

If two planes are perpendicular to another plane, then the intersection of the two planes is perpendicular to this plane. Is this a theorem?

If two intersecting planes are perpendicular to the third plane at the same time, then their intersecting lines are perpendicular to the third plane

What is the positional relationship between circle x ^ 2 + y ^ 2-4x + 4Y + 6 = 0 and circle x ^ 2 + y ^ 2-6x + 2Y + 1 = 0

Circle 1: x ^ 2 + y ^ 2-4x + 4Y + 6 = 0 - > (X-2) ^ 2 + (y + 2) ^ 2 = 2 - > Center (2, - 2), R1 = √ 2
Circle 2: x ^ 2 + y ^ 2-6x + 2Y + 1 = 0 - > (x-3) ^ 2 + (y + 1) ^ 2 = 9 - > Center (3, - 1), R2 = 3
According to the two-point distance formula, d = √ [(x1-x2) ^ 2 + (y1-y2) ^ 2] = √ 2
Because D

What is the meaning of E in e ^ x on fx-5800p calculator key

It's the x power of E

Simple application problems of quadratic equation of one variable
A tabletop is 6 meters long and 3 meters wide. The area of the tablecloth on the table is three times that of the tabletop, and the length of each side is the same

Let the length of the drop be 2x
(6+2X)(3+2X)=6*3*3
Solution
X＝1．5
The length is 9
The width is 6

Prove that a function is bounded

If a + B = 3, ab = - 4, then the value of (A-2) (b-2) is______ ．

The original formula = ab-2a-2b + 2 = ab-2 (a + b) + 2, when a + B = 3, ab = - 4, the original formula = - 4-2 × 3 + 2 = - 8

How much is the square of 2x - 4x

2X^2-4X=2X(X-2).
Note: the calculation can no longer be carried out,
Above is the factorization

Solve the equation. 1112x-120% x = 6.5 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 1112x-120% = 6.5

（1）1112X-120%X=6.5-1760X=6.5-1760X÷（-1760）=6.5÷（-1760）                 X=-39017；（2）1112X-120%=6.51112X-120%+120%=6.5+120%          1112X=7.7     1112X÷1112=7.7÷1112             X=8.4．