Composite Solid

This is a picture of the door to my pantry. This door is a composite solid because it is made up of a big rectangular prism with a small sphere on top of it. This door is used for opening and closing my pantry. If we did not have this door our food would all be visible to the people standing in the kitchen and that would not look very nice. The sphere on top of the door is a mandatory part of this door because if that piece was removed we would not be able to open and close the door to get to our food. I took this picture while I was home. I had never realized that this door was a composite solid.

Regular Octagon

         This is a picture of a donut I took at gymnastics. Donuts are mostly used by little class kids. The kids sit inside them and get rolled for fun. This piece of equipment is mostly just used for fun, but sometimes it is used for jumping. The donut has eight sides, so it is a octagon. The measure of the angles in this shape can be found by taking the number of sides: 8, and then subtracting two from that. Then you take 5 and multiply that by 180 which is equal to 1,080.  In order to find the measure of each individual angle you must divide 1,080 by 8 which equals 135. All of the angles in this octagon are congruent so this shape is a regular octagon.

Supplementary Angles that do not Form a Linear Pair

           This is a picture of a chair in my kitchen. The cross in the back was put their for decoration, comfort, and support. If there was no cross in the back the chair would not look very good, your back would not feel as comfortable, and the wood would not be as sturdy. Line A and B are perpendicular to each other. Since they are perpendicular to each other they form right angle. Angle C and angle D are both right angles so they have a measure of 90 degrees. Supplementary angles equal 180 degrees when combined; angle C and angle D are supplementary. Angle C and angle D do not form a linear pair because they are not adjacent to each other.

Non-congruent Alternate Interior Angles

This is a picture of a polar coordinates board that I took during study hall. This board is very useful for math. Line A and B appear parallel at first sight but are really not not parallel. The pink line is a transversal. Angle x and angle y are alternate interior angles.  These two angles are not congruent becaue line A and B are not parallel.

This second picture is a picture of a very loopey polar graph.

Skew Lines

Skew lines are found all over the world. The photograph above is a real world example of a picture of a water fountain with skew lines in it. The two skew lines displayed above are skew because they are not parallel and lie in two different planes so they wil never intersect each other. The water fountain froze because it got too cold. When the water fountain froze the water created a bunch of parallel lines all around it. Although this water fountain is not vital to this town it makes it look much better. The bricks in this picture are put together in a pattern creating a bunch of lines. If these bricks were not put together in this way then the sidewalk would not be able to be built.

Congruent Isosceles Triangles

These are two congruent isosceles triangles that were found above the pool in the Severna Park Comminity Center and are found above all pools. These triangles are congruent by SAS. These flags are important for swimming because they help you while doing back stroke, give you spaciel awareness of where you are in the pool, and allow you to do stroke counts for your flip turn.