Question

In the fig. AOB is a straight line Calculate the measure of angle COD

Plz help for 25 points ​

Answer 1

Answer:

60°

Step-by-step explanation:

we know that the angle of a straight line is 180°

so

As per question

x+20+(2x-20)+60=180

x+2x+60=180

so

3x=120

x=40°

Now your required answer is 2x-20°

which is 2*40-20

=80-20

=60°

Answer 2

Answer:

ANSWER

AOB is a straight line

∴∠AOC+∠COD+∠DOB=180

∘

⇒x+20

∘

+2x−20

∘

+60

∘

=180

∘

⇒3x=120

∘

⇒x=40

∘

∠COD=2x−20

∘

=(2×40

∘

)−20

∘

=60

∘