Question

Two adjacent angles on a straight line are in the ratio 5:4.find the measure of each one of these angles

Answer 1

Adjacent angles on a straight line are 180
$5x + 4x = 180 \\ 9x = 180 \\ x = \frac{180}{9} \\ x = 20$
one angle is 5(20)=100°
other is 4(20)= 80°