Slide Notes

Glossary

All Slides

Navigation

 

Diagonals in Quadrilaterals

Source: Ferris Wheel - pastorschott/E+/Getty Images

 

Quadrilateral Review

The family of quadrilaterals.

 

Buildings

What quadrilaterals can you find in the following images?

Sources: House - buzbuzzer/iStock/Getty Images; Leaning Barn - tbob/iStock/Getty Images

 

Lesson Goals

  • Investigate the properties of quadrilateral diagonals.

Source: Gears - Hilch/iStock/Getty Images Plus

Diagonals

A diagonal in a quadrilateral is a line segment drawn from one vertex to the opposite vertex.

 

 

Try This!

For each example, the points \(A\), \(B\), \(C\), and \(D\) are vertices of a quadrilateral but we have erased the sides and drawn just the diagonals of the quadrilateral.  

Points A, B, C, and D are formed such that diagonal AC and diagonal BD are equal and intersect at a right angle.

Points A, B, C, and D are formed such that diagonal AC and diagonal BD are not equal and intersect at a right angle.

Points A, B, C, and D are formed such that diagonal AC and diagonal BD are not equal and do not intersect at a right angle.

Word Bank

trapezoid, parallelogram, rhombus, rectangle, square

Think about this problem, then move on to the next part of the lesson.

Paused Finished
Slide /