Question

plzzz solve 5th one only fast ​

Answer 1

Answer:

x=20°

3x+10+3x+10+2x=180°

Step-by-step explanation:

8x+20=180

8x=160

Answer 2

Answer:

Claim down I'll help you

20°

Step-by-step explanation:

As you can see in the figure AB=AO ...(Given)

Therefore it is an isosceles triangle and Angles opposite to equal sides of an isosceles triangle are equal

<ABO=<AOB

3x+10°=<AOB

Now,<AOB=<COD...(Vertically opposite angles)

3x+10°=<COD

In ∆ COD

CO=CD....(Given)

<COD=<CDO... Angles opposite to equal sides of an isosceles triangle are equal

3x+10°=<CDO

Now we have Three angles of ∆COD

So,

<CDO+<COD+<DCO=180°

(3x+10)+(3x+10)+2x=180°

8x+20=180

8x=180-20

8x=160

x=160/8

x=20°

Hope it helps you dear