Posted by **James** on Friday, February 23, 2007 at 8:58am.

If the measures of the angles in a triangle are in the ration 3:4:5, the measure of the exterior angle of the triangle can not be

a) 120D b)165D c)105D d)135D

b 165

With the triangle ratio of 3:4:5 the equation can be made:

3x + 4x + 5x = 180

x = 15

The angels of the triangle then are 45, 60, and 75.

Their exterior angles are:

135, 120 and 105

Thus choice b is not a correct responce.

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