Triangle and Quadrilateral

Triangle with three equal sides.

• scalene triangle

• isosceles triangle

• equilateral triangle

Quadrilateral with four equal sides and four right angle.

• rectangle

• square

• trapezoid

Triangle with no equal sides.

• scalene triangle

• isosceles triangle

• equilateral triangle

Quadrilateral with one pair of opposite sides parallel.

• square

• rhombus

• trapezoid

Triangle with two equal sides.

• scalene triangle

• isosceles triangle

• equilateral triangle

Quadrilateral with 4 equal sides and no right angles.

• square

• rhombus

• parallelogram

Triangle with three acute angles, each measuring less than 90°.

• acute triangle

• obtuse triangle

• right triangle

Triangle with one angle measures 90°

• acute triangle

• obtuse triangle

• right triangle

Triangle with one obtuse angle which measures more than 90°

• acute triangle

• obtuse triangle

• right triangle

Quadrilateral with four right angles and with opposites sides are equal.

• square

• parallelogram

• rectangle