How many triangles can be constructed with side measurements 6 cm, 15 cm, 20 cm?
a. no triangles
b. exactly one triangle
c. more than one triangle

Option: B is the correct answer.

         B.   Exactly one triangle.

We are given the side lengths of a triangle as:

    6 cm, 15 cm and 20 cm.

We know that with the help of all the three side lengths of a given triangle a unique triangle is constructed.

( Whereas with the help of given three angle measures of a triangle infinite number of such triangles could be constructed with different side lengths)

            Hence, the answer is:

                      Option: B

1 1/4 hours

step-by-step explanation:

2/4 + 2/4 + 1/4 = 5/4 or 1 1/4