Amanda had a cup full of three black pens, two green pens, and three
blue pens. What is the probability that
Amanda will choose a black pen, put it
back, and then choose a green pen,
without looking?

the answer is:

the lateral area is equal to

to find the lateral area of the square pyramid, first we need to find the perimeter of the base, and then, find the lateral area using the following formulas:

where,

s, is the base length

slant height, is the height of a the side of the pyramid

we are given:

now, calculating the perimeter of the base, we have:

then, calculating the lateral area:

hence, we have that the lateral area is equal to

have a nice day!

if the angular bisector of an triangle bisects the opposite side, prove that the other two sides are equal.

what is the question?