# Eye-Balling

- Unless stated otherwise, all figures are drawn exactly to scale. Hence, if an angle looks like it’s about 90°, it is; if one figure looks like it’s about twice as large as another figure, it is.

Example-1

In the figure, if , then what is the value of *y*?

- 20
- 45
- 55
- 75
- 110

Solution

By eye-balling the drawing, we can see that y is less than 90˚.

It appears to be somewhere between 65˚ and 85˚.

But 75˚ is the only answer-choice in that range.

Hence, the answer is (D).

Example-2

In the figure, the area of the shaded region is

- 1/2
- 2/3
- 7/8
- 3/2
- 5/2

Solution

The area of the larger triangle is .

Now, by eye-balling the drawing, the area of the shaded region looks to be about half that of the larger triangle.

Therefore, the answer should be about .

The closest answer-choice to 1 is 7/8.

The answer is (C).