Answer:
60° and 80°
Explanation:
The sum of the interior angles of a quadrilateral = 360°
Given 2 angles in ratio 3 : 4 = 3x : 4x ( x is a multiplier )
Sum the 4 angles and equate to 360
140 + 80 + 3x + 4x = 360, that is
220 + 7x = 360 ( subtract 220 from both sides )
7x = 140 ( divide both sides by 7 )
x = 20
Thus
3x = 3 × 20 = 60° and 4x = 4 × 20 = 80°