## Five Geometry Terms

Geometry is a kind of mathematics that deals with shapes.

and

__Euclid__,__Archimedes__,and

__Descartes__are famous mathematicians that studied geometry.1.

An angle is the measurement (in degrees) of the space between two lines

that are joined at a single point. Different angles are given different names

based on their size. To learn more, click

__Angles__An angle is the measurement (in degrees) of the space between two lines

that are joined at a single point. Different angles are given different names

based on their size. To learn more, click

__here__.2.

__Triangles__

Did you know that triangles are given different names depending on how many of

their sides are equal in length or the size of their angles? To learn more, click

__here__.

3.

__Lines__

Lines can be

__parallel__(they are side by side, but never meet),

__intersecting__(crossing),

or

__perpendicular__(cross making a 90 degree angle).

4.

Hypotenuse is just a fancy term for the side of a right triangle that is opposite the

90 degree angle (the longest side).

__Hypotenuse__Hypotenuse is just a fancy term for the side of a right triangle that is opposite the

90 degree angle (the longest side).

5.

__Pythagorean Theorem__

Right triangles are really cool and here is one reason why. First label the sides of

your right triangle a, b, and c, like in the picture below so that side c is the hypotenuse.

Then, if you square the length of side a and square the length of side b, and then add

them together, you will get the length of side c squared! To learn more, click

__here__.

Let's try out the Pythagorean Theorem.
Let's suppose the length of side a = 3 and the length of side b = 4 So how do we find the length of side c? First we calculate a squared, which is 3 squared = 9 Then we calculate b squared, which is 4 squared = 16 So 9 + 16 = 25 The square root of 25 is 5. So side c (the hypotenuse) = 5! |