Classify Quadrilaterals and Triangles

What is a quadrilateral?

• A type of fruit.

• A shape with five sides.

• A polygon with four sides.

• A musical instrument.

Name the types of quadrilaterals based on their properties.

• Pentagon

• Square, Rectangle, Parallelogram, Rhombus, Trapezoid, Kite

• Hexagon

• Circle

How are triangles classified by angles?

• Triangles are classified by angles as round, square, or hexagonal.

• Triangles are classified by angles as happy, sad, or angry.

• Triangles are classified by angles as big, medium, or small.

• Triangles are classified by angles as acute, right, or obtuse.

How are triangles classified by sides?

• By the shapes of their sides

• By the lengths of their sides

• By the colors of their sides

• By the materials of their sides

Can you name any special quadrilaterals?

• square, rectangle, rhombus, parallelogram, trapezoid, kite

• circle

• octagon

• hexagon

What are the properties of an equilateral triangle?

• All sides are different lengths, all angles are equal and measure 90 degrees

• All three sides are equal in length, all three angles are equal and measure 60 degrees, and the sum of all angles is 180 degrees.

• Two sides are equal in length, all angles are equal and measure 60 degrees

• All sides are equal in length, all angles are equal and measure 90 degrees

Define an isosceles triangle.

• A triangle with at least two sides of equal length.

• A triangle with no equal sides.

• A triangle with all sides of equal length.

• A triangle with three sides of different lengths.

What is a scalene triangle?

• A scalene triangle is a triangle with all sides equal.

• A scalene triangle is a triangle with one right angle.

• A scalene triangle is a triangle with no equal sides.

• A scalene triangle is a triangle with two equal sides.

Explain the concept of congruent triangles.

• Congruent triangles are triangles that have the same size and shape. This means that all corresponding sides are equal in length, and all corresponding angles are equal in measure.

• Congruent triangles have different corresponding sides and angles.

• Congruent triangles are only defined for right-angled triangles.

• Congruent triangles are triangles with different sizes but the same shape.

Name a few criteria for determining congruent triangles.

• SSS, SAS, ASA, AAS, HL

• AAA

• SSA

• SSA