Vocabulary for two dimensional figures

• 1 pentagon, 1 hexagon, 1 octagon, 4 quadrilaterals, 1 triangle, and 1 circle.
• 2 pentagons, 1 hexagon, 1 octagon, 3 quadrilaterals, 1 triangle, and 1 circle.
• 1 pentagon, 2 hexagons, 2 octagon, 3 quadrilaterals, 1 triangle, and 1 circle.
• 1 pentagon, 1 hexagon, 1 octagon, 4 quadrilaterals, 2 triangles, and 1 circle.

• 1 rhombus, 1 trapezoid, 1 square, 1 rectangle, and 1 triangle
• 1 trapezoid, 2 squares, 1 rectangle, and 1 triangle
• 1 rhombus, 2 trapezoids, 1 square, 1 rectangle, and 1 triangle
• 1 rhombus, 1 trapezoid, 2 rectangles, and 1 triangle

• triangle
• square
• rhombus
• rectangle

Having only two dimensions, length and width, but no depth/thickness.

• three dimensional

• polygon

• two dimensional

• congruent

A closed, two-dimensional (plane) shape with straight sides.

• quadrilateral

• plane

• sphere

• polygon

A three-sided, two-dimensional shape with straight sides.

• acute triangle

• triangle

• isosceles triangle

• equilateral triangle

A triangle that has all angles less than  $90\degree$  .

• right triangle

• scalene triangle

• obtuse triangle

• acute triangle

A triangle that one angle greater than  $90\degree$  .

• right triangle

• obtuse triangle

• equilateral triangle

• acute triangle

A triangle with one  $90\degree$  angle.

• equilateral triangle

• right triangle

• scalene triangle

• obtuse triangle

A triangle with no sides and no angles equal (all sides and angles are different lengths).

• scalene triangle

• isosceles triangle

• equilateral triangle

• acute triangle