Question

please answer by solving​

Answer 1

Answer:

Step by step explanation:-

the explanation is in the image

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Option - A) 80°

Answer 2

Answer:

80

Step-by-step explanation:

Let the first 3 angles be 1x,2x and 3x

4th angle = 120 Degrees

Sum of all angles in a quadrilateral = 360 Degrees

1x + 2x +3x +120 = 360 Degrees

By transposing 120 to the other side we get :

6x = 360-120

6x = 240 Degrees

By transposing 6 to the other side we get :

x = 240/6

x = 40 Degrees

Greatest angle = 3x = 3 x 40 = 120 Degrees

Smallest angle = x = 1 x 40 = 40 Degrees

Average of Smallest and Greatest angle = 120 + 40 /2 = 160/2 = 80

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