Re: Vectors (plane and line)

for no2 intersects x axis if there is a point on it with y=

0 and z=0

Similarly for other 2 axes

Re: Vectors (plane and line)

Hello, hiy312!

Two lines are coplanar if they intersect.

We have: .

Equate coordinates: .

Solve the system of equations: .

The lines intersect at . . . They are coplanar.

The normal of the plane is perpendicular to both lines.

The lines have vectors: .

Hence: .

. . . . . .

The equation of the plane through with is:

. .

Re: Vectors (plane and line)

Quote:

Originally Posted by

**biffboy** for no2 intersects x axis if there is a point on it with y=

0 and z=0

Similarly for other 2 axes

Sorry but I really dont understand.. I think I need a solution

Re: Vectors (plane and line)

Thank you so much! It helps me a lot!

Re: Vectors (plane and line)

Can anyone teach me the other three questions please?

Re: Vectors (plane and line)

For question 1, after you have found the foot of normal line, you can use such an equation: the vector formed by pointing from foot to point A is equal to the vector formed by pointing from image to the foot.