there are 3 different types of triangles:
an equilateral triangle: all sides and angles are the same
an isosceles triange: 2 sides are the same and the 2 base angles are equal
a scalene triange: nothing is the same
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If two angles and the side opposite one of them in one triangle are equal to one side and two similarly located angles in a second triangle then the two triangles are congruent. (The triangles are exactly the same shape and size as each other).
It means that if you take a piece of paper and cut out 8 little squares from it, with each square beingexactly 1 inch on a side, then the amount of paper in these 8 pieces will exactly cover the shape,no matter what shape the shape is.
A Right Triangle or sometimes called a Right-angled Triangle has one angle = 90 degrees
A triangle has three faces. In geometry, a face refers to a flat surface of a solid shape. Since a triangle is a two-dimensional shape with three sides, it has three faces. Each side of the triangle forms one of its three faces.
pentagonal square