Starting from point A, Tianna moves 20 m to point C in the northeast direction before turning to her right. She walks 20 m again, turning to her right and stopping at point B. How far is point A from point B?

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![Screenshot 2025-04-05 050159.png](https://res.cloudinary.com/aptidude/image/upload/v1743809530/aptidude_questions/dcny7cceawsdnmq9cecl.png)

Tianna's movement forms a right-angled triangle:  
1. She first moves 20 m in the northeast direction (diagonal movement).  
2. Then she turns right and walks another 20 m.

The distance between point A and point B (AB) is the hypotenuse of a right triangle with both legs equal to 20 m. Using the Pythagoras theorem:  
$$
AB = \sqrt{(20)^2 + (20)^2}
$$  
$$
AB = \sqrt{400 + 400} = \sqrt{800} = 20\sqrt{2} \, 	ext{m}
$$

Thus, the distance between points A and B is **$$ 20\sqrt{2} \, 	ext{m} $$**.

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