A triangle is a polygon. It is a closed 3-sided shape made up of straight lines. The ‘tri-’ part of the word triangle means three. A triangle has 3 sides and 3 angles. Interior angles are the angles ...
The three angles in any triangle add up to 180°. You can use this information to find a missing angle. A scalene triangle has three different angles. To find a missing angle you need to know the other ...
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Geometry Tutorial: Triangles, Congruency & Types
Discusses the properties and types of triangles, explaining that a triangle is a closed figure with three sides and angles. It categorizes triangles into equilateral, isosceles, scalene, obtuse, right ...
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