Question

Find value of x plz step to step

Answer 1

Answer:

triangle sum is 180

angleA+angle B+angle C=180

70°+40°+angleC=180

110+angle C=180

angle C=180-110

angle C=70

angleACB+angle ACD+angle DCE=180

70°+x+90°=180

160°+x=180

x=180-160

x=20

Answer 2

Answer:

angle A + angle B+ angle C = 180

let angle C be y

70+40+y=180

110+y=180

y=180-110

y=70

for X

70+X+90=180

160+y=180

y=180-160

y=20

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