10in
15 in.
18 in.
36 in.
20 in.
30 in.
Randee draws these two triangles with lengths given in centimeters. What scale factor does she use to create the copy on the right from the original on the left?
A. 1/2
B. 1 2/3
C. 2
D. 1 1/3
To find the scale factor, we compare the corresponding sides of the two triangles.
For the first set of sides, comparing 10 in. to 36 in., we can divide 36 by 10:
36/10 = 3.6
For the second set of sides, comparing 15 in. to 20 in., we can divide 20 by 15:
20/15 = 1.3
For the third set of sides, comparing 18 in. to 30 in., we can divide 30 by 18:
30/18 ≈ 1.67
Since the scale factors are approximately 3.6, 1.3, and 1.67, the answer is closest to option B: 1 2/3.