Question

in figure 3.8, angle ACD is an exterior angle
ABC.
ZB = 40°, ZA= 70°. Find the measure of angle ACD​

Answer 1

Answer:

let ACD be x degree

now sum all the angle equal 180 degree

angle ZB + angle ZA + angle ACD = 180 degree

40 + 70 + x = 180

110 +x = 180

x = 180 - 110

x = 70

therefore angle ACD = 70 degree

HOPE it helps you