Classifying Triangles and Quadrilaterals TEKS 5.5A

Front

What is a triangle?

Back

A triangle is a polygon with three edges and three vertices.

Front

What are the three types of triangles based on side lengths?

Back

1. Equilateral Triangle: All sides are equal. 2. Isosceles Triangle: Two sides are equal. 3. Scalene Triangle: All sides are different.

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle in which all three sides are of equal length and all three angles are equal to 60 degrees.

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length and the angles opposite those sides are equal.

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle in which all three sides are of different lengths and all three angles are different.

Front

What is a quadrilateral?

Back

A quadrilateral is a polygon with four edges (sides) and four vertices (corners).

Front

What are the types of quadrilaterals?

Back

1. Square 2. Rectangle 3. Rhombus 4. Trapezoid 5. Parallelogram 6. Kite.

Front

What is a square?

Back

A square is a quadrilateral with all four sides of equal length and all four angles equal to 90 degrees.

Front

What is a rectangle?

Back

A rectangle is a quadrilateral with opposite sides equal in length and all four angles equal to 90 degrees.

Front

What is a trapezoid?

Back

A trapezoid is a quadrilateral with at least one pair of parallel sides.