Answer:
63° and 105°
Explanation:
given the ratio of 2 angles is 3 : 5 = 3x : 5x ( x is a multiplier )
the sum of the 3 angles in a triangle is 180°
sum the 3 angles and equate to 180
3x + 5x + 12 = 180
8x + 12 = 180 ( subtract 12 from both sides )
8x = 168 ( divide both sides by 8 )
x = 21
then
3x = 3 × 21 = 63
5x = 5 × 21 = 105
the measure of the other 2 angles is 63° and 105°