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12 terms

Types of Triangles and Quadrilaterals

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Acute Triangle
a triangle with 3 acute angles
Obtuse Triangle
a triangle with one obtuse angle
Right Triangle
a triangle with 1 right angle
Equilateral Triangle
a triangle with three equal sides
Isosceles Triangle
a triangle with two congruent sides
Scalene Triangle
a triangle with no congruent sides
Quadrilateral
a polygon with 4 sides
Parallelogram
A quadrilateral with two pairs of parallel sides
Trapezoid
a quadrilateral with exactly one pair of parallel sides
Rhombus
a parallelogram with 4 congruent sides
Rectangle
a parallelogram with four right angles
Square
having four equal sides and four right angles or forming a right angle