Question

Step by step explaination

class 7 maths​

Answer 1

Answer:

draw a imaginery line as shown in above picture

Step-by-step explanation:

Angle O = green angle + blue angle

to find green angle :

30+green angle = 180 (co interior angles sum upto 180

green angle = 150

to find blue angle :

40+blue angle = 180 (co-interior angle)

blue angle = 140

angle O = 140+150

angle O = 290