Today, Oliver and I worked through much of Chapter 9 in the textbook. We began discussing the key differences between points, line, planes, line segments, and rays. We discussed parallel and perpendicular intersecting lines, right angles, acute angles, and obtuse angles. We briefly used a compass to observe that there are 360 degrees around a standard compass, and this is important when working with degrees in mathematics. We then talked about the number of degrees for the internal angles of any triangle (i.e. 180 degrees) and any quadrilateral (i.e. 360 degrees). We then went on to discuss the various types of triangle, and we work through finding the three angles for a right isosceles triangle. Finally, we ended by discussing the various types of quadrilaterals (ex. rhombus, trapezoid, parallelogram, and rectangle).