Question

The area of triangle A B C is twelvesquare centimeters. Each of the dimensions of triangle D E F is 3 times the dimension of triangle A B C. What is the area of triangle D E F?

Triangle A B C and triangle D E F are placed side-by-side. They are both similar triangles. Triangle A B C is smaller than triangle D E F.

4 square centimeters

thirty-six square centimeters

seventy-two square centimeters

one hundred eight square centimeters

Answer 1

@sambolin1996

Answer 2

@tanya123 @terezi

Answer 3

thirty-six square centimeters

Answer 4

Trapezoid P Q R S and trapezoid W X Y Z shown below are similar. What is the perimeter of trapezoid W X Y Z?

Trapezoid P Q R S and trapezoid W X Y Z are placed side-by-side. Side P Q is nine meters. Side Q R is twelve meters. Side R S is nine meters. Side S P is six meters. Side X Y is eight meters.

6 meters

twenty meters

twenty-four meters

thirty-six meters

Answer 5

@samveilbride @sambolin1996

Answer 6

@texaschic101

Answer 7

well why not look at the problem this way pick 2 measurements that produce a triangle area of 12 cm^2

so perhaps base = 12 and height = 2

Area = 1/2 x 12 x 2

now triple the measurements...

what's the area of the new triangle...

Answer 8

@yolo_101 @undeadknight26 @Whitemonsterbunny17 @iPwnBunnies @Vandreigan @Xmoses1

Answer 9

I'm soooo sorry but I don't know how to do this kind of thing. D:
I wish I could've been more helpful!! :s

Answer 10

@yoloyolo @ovoxo_yari @SithsAndGiggles @bobsue

Answer 11

well draw a diagram showing the trapezoids.... then find the dilation factor by comparing the ratio of corresponding sides in similar triangles...

when you know the value multiply the perimeter of PQRS by the dilation factor.

hope it helps

Answer 12

@campbell_st