When you add a right angle (90 degrees) and an acute angle (less than 90 degrees) in a triangle, you end up with a triangle known as a right-angled triangle. In a right-angled triangle, one of the angles is always 90 degrees, making it a right angle. The other two angles can be any combination of acute or obtuse angles, as long as the sum of all angles equals 180 degrees.
The side opposite the right angle in a right-angled triangle is called the hypotenuse. The other two sides are known as the legs of the triangle. The Pythagorean theorem, a fundamental concept in geometry, states that in a right-angled triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the two legs. This theorem is often used to solve for missing side lengths in right-angled triangles.
Right-angled triangles have many real-world applications, especially in fields such as engineering, architecture, and physics. They are commonly used in construction to ensure stability and strength in structures. The concept of right-angled triangles is also essential in navigation, as it helps in calculating distances and angles accurately.
One of the most famous right-angled triangles in mathematics is the 3-4-5 triangle, where the lengths of the three sides are in the ratio of 3:4:5. This triangle has been used since ancient times for its simplicity and unique properties.
In conclusion, when you add a right angle and an acute angle in a triangle, you end up with a right-angled triangle. Understanding the properties and relationships of right-angled triangles is crucial in various practical applications and mathematical calculations. If you want to learn more about right-angled triangles and their properties, you can visit Math Planet for detailed explanations and examples.
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