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Graduated from Columbia University in the United States and has rich practical experience in mathematics competitions’ teaching, including Math Kangaroo, AMC… He teaches students the ways to flexible thinking and quick thinking in sloving math questions, and he is good at inspiring and guiding students to think about mathematical problems and find solutions.
The right angle (90 degree angle) is an essential notion in geometry. A right angle measures exactly 90 degrees and is important in many fields, including construction, mathematics, and architecture. But what is a right angle? In this post, we will explore the definition of right angles, learn about right angle triangle, and how to construct or measure angles, different…