Brenda observes that the keyboard and the screen of an open laptop lie on two different planes. in how many lines do the planes containing the keyboard and the screen intersect ?

One line.

Step-by-step explanation:

We know that a plane is a two dimensional flat platform , which has infinite length and width.It contains infinite number of lines.

The intersection of two planes is a line .

Given statement : Brenda observes that the keyboard and the screen of an open laptop lie on two different planes.

Then In only one line the planes containing the keyboard and the screen intersect .

answer: just subtact the units and then add the non negative : happy to

step-by-step explanation:

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length