The angles inside any triangle sum to 180 degrees. Isosceles simply means two sides are the same length.
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It has 180 degrees, but one angle of the triangle has to be 90 degrees
Every triangle has three angles that total 180o. In an equilateral triangle, there are three 60o angles.
ALL triangles - have internal angles that add up to 180 degrees.
A Square Or A Quadrilateral Or A Polygon With Four Straight Sides Has 360 Degrees!!=] I Know This Is Not The Question But It Is Related] A Triangle Has 180 Degrees!!=)
No. An acute triangle only has angles less than 90 degrees. A triangle with a 130 degree angle is obtuse.