1990 AMC 8 Problem 15
Attempt Problem 15 of the 1990 AMC 8 below, then check your answer against the professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 1990 AMC 8 solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
15.
The area of this figure is Its perimeter is
(The figure consists of four identical squares.)
Small hint:
Each of the four squares has area
Big hint:
Find the side length of one square, then count how many side lengths make up the outline
Solution:
Each of the four squares has area , so each side is
The outline of this staircase shape is made up of such sides, so the perimeter is
Thus, the correct answer is E .
Problem 15 in other years
- 1985 AMC 8
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