Which of the following is true?
a. perpendicular lines never intersect each other.
b. parallel lines always intersect each other
.c. parallel lines are always in the same plane.
d. perpendicular lines are not in the same plane.

Turner's mom measured his room to see how long the wallpaper border needed to be. if two walls are 15 feet long and two walls are 12 feet long, how long should the strip of border be cut?

Explain why the factor 1.5 is broke. into two numbers in the model.

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.