Answer:
the answer for no.19. is 129°
Step-by-step explanation:
firstly as you can see line DE is actually the diameter which is equal to 180°. the angle CD is equal to 51° so all we have to do is minus 51° from 180° which is equal to 129°.
You can also minus 108° from 180° the answer is 72° therefore the angle for line BFE is 72°. Add all the answer should be 360° which is the total degrees for a circle.
