Question

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

Answer 1

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