ELECTIVE MATH 7 (2ND GRADING PERIOD) Lesson 4 & 5

ELECTIVE MATH 7 (2^ND GRADING PERIOD)

Lesson 4 & 5

Use a Protractor and a Compass

This is a protractor, it helps you measure angles (in degrees):

Angle can be measured from either the clockwise direction or the anti-clockwise direction. From the figure above, the steps of measuring ÐPQR;

11.    Place the center of the protractor on vertex A and overlap the base kine with arm QP of the angle.

22.    Measure the size of ÐPQR by using the inner scale. Therefore, ÐPQR = 70°.

Please check these links for your info:

file:///C:/Users/beth/Downloads/file%20oct%201/Line%20Bisector%20Construction.htm

file:///C:/Users/beth/Downloads/file%20oct%201/Angle%20Bisector%20Construction.htm

http://www.mathsisfun.com/geometry/construct-30degree.html

file:///C:/Users/beth/Downloads/file%20oct%201/45%20Degree%20Angle%20Construction.htm  

file:///C:/Users/beth/Downloads/file%20oct%201/60%20Degree%20Angle%20Construction.htm 

     file:///C:/Users/beth/Downloads/file%20oct%201/Equilateral%20Triangle%20OR%2060%20degree%20angle%20Construction.htm

                               

Lesson 6

                                            PLANE FIGURES 

REGULAR POLYGON – all sides are of equal length and all interior angles are equal.

LESSON 7

THREE DIMENSIONAL FIGURES

Three dimensional figures are objects which occupy space. They simply called solids.

There are two types of solids.

11.    Polyhedra – are solids enclosed by polygons, such as cubes, rectangular solid,triangular prisms, quadrilateral pyramids etc.

22.    Non – polyhedral – are solids enclosed by both planes and curves surfaces, or curved surfaces only such as cylinders, circular cones,spheres,torus, etc.

Hello my students!

I would like to inform to you, this is the last lessons I will post on this blog. Hope you can browse and understand all the topics I summarized for the second grading period.

If you have your book, please try to answer all the exercises from CHAPTER 7.

GOD BLESS and keep always safe.

Teacher Russel Flores