click below
click below
Normal Size Small Size show me how
Shapes
Term | Definition |
---|---|
Triangle | A 3-sided polygon. |
Equilateral triangle | A triangle that has three congruent side lengths and three angles measuring 60°. |
Isosceles triangle | A triangle that has two congruent side lengths. |
Scalene triangle | A triangle where all three sides are different lengths. |
Acute triangle | A triangle with three acute angles. (Three angles each measuring less than 90°.) |
Right triangle | A triangle with exactly one right angle. (One angle measuring exactly 90°.) |
Obtuse triangle | A triangle with exactly one obtuse angle. (One angle measuring greater than 90°.) |
Quadrilateral | A polygon with four sides, four angles, and four vertices. |
Square | A quadrilateral with four equal side lengths and four angles measuring 90°. |
Rectangle | A quadrilateral with four angles measuring 90°. |
Rhombus | A quadrilateral with four equivalent side lengths. |
Parallelogram | A quadrilateral with two sets of opposite, parallel sides. |
Trapezoid | A quadrilateral with one set of parallel sides that are opposite one another. |
Altitude | Commonly referred to as height. Altitude is always perpendicular to the base of the figure. |