Approximate Irrational Numbers Practice Test

Use $$\pi \approx 3.1416$$ instead, since more decimal places in $$\pi$$ will give a more accurate result for $$\pi^2$$

Calculate $$\pi^2$$ directly as approximately 9.87 without squaring an approximation of $$\pi$$

Use the fact that $$\pi^2 \approx 10$$ since $$\pi$$ is closer to 3 than to 4, making $$\pi^2$$ closer to 9

Use $$\pi \approx 3.1$$ instead, since rounding to fewer decimal places reduces computational errors in squaring