The angles of a triangle are in the ratio 3:4:5. what is the degree measure of the smallest angle of the triangle?

A triangle interior angles add up to 180

so we have 3:4:5

the ratio of the angles

3+4+5=12

therefor 180=12 units

divide by 12

15=1 unit

subsitute

find the smallest unit

3

3 times 15=45

answer is 45 degrees