Hello there!
To start with subtract the membership fee from the total of $21:
$21 - $12 = $9.
Divide what is left by the cost per video rental:
$9/ $1.50 = $6.
In short, she can rent 6 videos.
Hope This Helps You!
Good Luck :)
I'm gonna go with triangle B. Triangles A,C,and E all look to be somewhat congruent in that they're all equilateral. Triangle D and F look similar but Triangle b looks like its isosceles and the others aren't like that.
A&C
B&F
Try it by fold the prism with paper
