Discover how the Pythagorean Theorem can solve all your right triangle problems! Learn how to use it easily with clear examples and quick tips. Ideal for students, math enthusiasts, and math Olympiads ...

Ashima Shiraishi, 19, is one of the most talented rock climbers in the world. And she'd like to let you in on a rather unglamorous secret: "Most of climbing, it's you just falling," she says. "Every ...