A triangle is a three-sided polygon where the sum of the interior angles is always 180 degrees. There are different types of triangles based on their angles and sides:
1. Based on angles:
- Acute triangle: All angles are less than 90 degrees.
- Right triangle: One angle is 90 degrees.
- Obtuse triangle: One angle is greater than 90 degrees.
2. Based on sides:
- Equilateral triangle: All three sides are equal in length.
- Isosceles triangle: Two sides are equal in length.
- Scalene triangle: All sides are different lengths.
The area of a triangle can be calculated using the formula: 1/2 * base * height. The perimeter of a triangle is the sum of its three sides. The Pythagorean theorem can be used to find the missing side of a right triangle: a^2 + b^2 = c^2, where c is the hypotenuse.
Triangles reveiw
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