Geometry: Theorems

Problems

Problem : Square ABCD has diagonals that intersect at point E. How do you know that triangles AEC and DEB are congruent?

Problem : Quadrilateral ABCD is a rhombus with diagonals that intersect at point E. Given angle ABE = 30 degrees and segment AD = 5, what is the area of triangle EBC?

Problem : What is the relationship between an upper base angle and a lower base angle of an isosceles trapezoid?

Problem : A midsegment connects the midpoints of the legs of an isosceles triangle. What is the most specific name by which the quadrilateral created can be called?

Problem : The endpoints of a segment and a point on the perpendicular bisector of that segment are the three vertices of a triangle. What kind of triangle must it be?

Take a Study Break

Star Trek gets SEXY

Chris Pine and Zoe Saldana heat up the red carpet!

Are you afraid of relationships?

Auntie SparkNotes can help!

Wanna get JLaw's gorgeous glow?

Click here for simple, sexy makeup tricks!

Sexy starlet style

See every single look from the Met Gala!

Who'd be on your zombie-apocalypse crew?

We already dib'sed Genghis Khan.

Before the fame!

9 Scientific Inaccuracies in Iron Man 3

Click to see what they got wrong.

Top 10 Predictions Sci-Fi Got WRONG

So wrong, they're WRONG.

The 15 Most Awesome Robots, Ever

These Robots Rock!

If You Like Game of Thrones...

...Then you'll LOVE these books!

The Book

Read What You Love, Anywhere You Like

Get Our FREE NOOK Reading Apps