Head First 2D Geometry

6

quadrilaterals

Dang it, I should stick

to geometry. I never get

my kites mixed up in the

quadrilateral family tree.

It’s hip to be square

Maybe three isn’t the (only) magic number.

The world isn’t just made up of triangles and circles. Wherever you look, you’ll see

quadrilaterals, shapes with four straight sides. Knowing your way ’round the quad family

can save you a lot of time and effort. Whether it’s area, perimeter, or angles you’re after,

there are shortcuts galore that you can use to your advantage. Keep reading, and we’ll

give you the lowdown.

this is a new chapter 235