Question

In quadrilateral ABCD angle B=90 angle C-angle D=60 and AngleA-angleC-angleD=10. Then angle A;C;D=?

Answer 1

Answer:

answer is here.

Step-by-step explanation:

b=90

a-c-d=10

c-d=60

a-60=10

a=70

a+b+c+d=360

90+70+c+d=360

160+c+d=360

c+d=360-160

c+d= 200

c-d=60

by cancelling d=0

2c=260

c=130

c+d =200

130+d=200

d=70

so,a=70,b=90,c=130 and d=70.

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