Geometry HELP?!?!?

Question

What is the distance between point P(2, 1, 3) and point Q(1, 4, 2) to the nearest tenth?

A. 35.1 units

B. 18.4 units

C. 9.3 units

D. 5.9 units



If A(2, 0, 1), B(1, 2, 3), C(0, 4, 2), and D(3, 1, 1) are points in a three-dimensional coordinate system, which segment is longest?

A. segment AB

B. segment BC

C. segment CD

D. segment DA


What are the coordinates of the midpoint of the segment joining A(2, 3, 1) and Z(6, 3, 1)?

A. (4, 3, 0)

B. (8, 6, 0)

C. (4, 0, 2)

D. (2, 0, 1)


If points P(6, 0, 4), Q(3, 2, 1), and R are collinear such that PQ = QR, which of the following are the coordinates of point R?

A. (0, 4, 2)

B. (3, 2, 3)

C. (1, 2, 0)

D. (4, 1, 3)


What is the longest stick that can be placed in a box 15 cm long, 20 cm wide, and 60 cm high?

A. 60 cm

B. 65 cm

C. 69 cm

D. 72 cm


MUCHOS GRACIAS!

Answer 1

You've got to at least try dude! You might not see it now, but it will benefit you to learn this stuff for yourself.

WILLIAM R - He's asking for someone to do his homework for him.

Answer 2

Distance Formula is something you can look up in your book.
That will help you with the first two problems. Its just plugging in numbers. As long as you know that the points are (x,y,z) you'll be fine.

The midpoint of a segment is just the difference of the x's divided by 2, difference of the y's divided by 2 and z's divided by 2.

Collinear means that all of the points are on the same line. You need to find the equation for the line through the two points you have and then just pick x and y and solve for z. This might be the hardest problem because my explaination isn't great.

The diagonal from the bottom of one corner to the top of the other corner is the longest length. If you start at (0,0,0) you can put the rest of the measurements together to form a box. I'll give you a hint, the two points you need are, (0,0,0) and (15,20,60). Just apply the distance formula from your book now.

Answer 3

i'm not sure what you are asking here, pal