Problem: The lengths in inches of the three sides of each of four triangles I, II, III, and IV are as follows:
I. , and
II. , and
III. , and
IV. , and
Of these four given triangles, the only right triangles are
Answer Choices:
A. I and II
B. I and III
C. I and IV
D. I, II, and III
E. I, II, and IV
Solution:
The Pythagorean Theorem applies to show that is not but , and are right triangles.