Question

3. Which set of lengths cannot form a right triangle?

a. 6 mm, 12 mm, 13 mm
2.5 mm, 6 mm, 6.5 mm
b. 5 mm, 12 mm, 13 mm
d. 10 mm, 24 mm, 26 mm

Answer 1

(A. 6mm, 12mm, 13mm) is the correct answer

a^2+b^2=c^2 is equal to a rught triangle

6^2+12^2=13^2

36+144=169

36+144=180

180 does not equal 169, thus making a not a right triangle and the correct answer