Classifying Triangles and Quadrilaterals

Front

What are the properties of a rectangle?

Back

A rectangle has opposite sides that are equal in length, all angles are right angles (90 degrees), and the diagonals are equal in length.

Front

How can you classify a triangle based on its side lengths?

Back

Triangles can be classified as scalene (all sides different lengths), isosceles (two sides equal), or equilateral (all sides equal).

Front

What defines a trapezoid?

Back

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

Front

What is the definition of an acute triangle?

Back

An acute triangle is a triangle where all three interior angles are less than 90 degrees.

Front

What is a right triangle?

Back

A right triangle is a triangle that has one angle measuring exactly 90 degrees.

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle that has one angle measuring more than 90 degrees.

Front

How do you determine if two lines are perpendicular?

Back

Two lines are perpendicular if the product of their slopes is -1.

Front

What is the formula for the slope of a line?

Back

The slope (m) of a line is calculated as m = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are two points on the line.

Front

What are the characteristics of a scalene triangle?

Back

A scalene triangle has all sides of different lengths and all angles of different measures.

Front

What is the relationship between the slopes of opposite sides in a rectangle?

Back

In a rectangle, opposite sides have the same slope, indicating they are parallel.