Question

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Answer 1

Answer:

70 degrees

Step-by-step explanation:

given∠wvu=90 degrees

in triangle WVU, ∠V=90

IN TRIANGLE ZRV ,  ANGLE ∠V=90

SO, SUM OF ANGLES IN A TRIANGLE IS 180

∠Z+∠R+∠V =180

a+b+90=180

a+b=180-90

a+b=90

IN TRIANGLE YSN,∠S=60

SUM OF ANGLES IN TRIANGLE IS 180

∠Y+∠S+∠N=180

e+60+f=180

e+f=180-60

e+f=120

in triangle pxy, ∠p=80

sum of angles in atriangle is 180

∠p+∠x+∠t=180

80+d+c=180

c+d=180-80

c+d=100

value of(a+b)-(e+f)+(c+d)=90-120+100

=90-20

=70

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