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A triangle is a shape that has three sides and three angles. Interior angles sum up to 180°

Types of triangle
1) Equilateral triangle has three equal sides and three equal angles. Each angle is 60°.

2) Isosceles triangle has two equal sides and two equal angles.

3) Scalene triangle has no equal sides and no equal angles.

Types of angle
1) Right triangle - has an angle that is 90°
2) Acute triangle - all angles are less than 90°
3) Obtuse triangle - has an angle that is more than 90°
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