Question

please answer quickly​

Answer 1

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Step-by-step explanation:

1. we know that sum of angles of linear pair is 180°

So, 7x+5x=180

12x=180

x=15

2. we know that sum of angles of linear pair is 180°

So, 2x+10+3x-10+40=180

5x+40=180

5x=140

x=24

3. w+35=180

w=145°

z=70 (line r is a transverse to line l and m)

70+35+y=180 (angle of triangle sum up to 180)

y=75°

Now, x=180-y-z=180-75-70

x=35°

4. x=180-125

x=55°

y=125 (alternate angles)

z=180-78

z=102°

5. angle DEB=50° (alternate angles)

angle CED = 180- angle DEB

=180-50

angle CED = 130°