Plane figures

are flat two-dimensional shape.

1. PLANE FIGURES Prepared by: Arrabis , Edmarie Coyoca , Flordelen Yase , Ma. Theresa

2. 0bjectives: I can define plane figures. I can enumerate all the principal geometric plane figures. I can draw the different principal geometric plane figures.

3. PLANE FIGURE - are flat two-dimensional (2D) shape. A plane figure can be made of straight lines, curved lines, or both straight and curved lines.

4. Plane Figures Principal Geometric Plane Figure The Circle - The  circle  is a shape that can be made by tracing a curve that is always the same distance from a point that we call the center.  The distance around a circle is called the  circumference  of the circle.

5. Plane figures The Triangle - The  triangle  is a shape that is formed by 3 straight lines that are called sides.  There are different ways of classifying triangles, according to their sides or angles.

6. Plane figures According to their angles: Right triangle: the largest of the 3 angles is a right angle. Acute Triangle: the largest of the 3 angles is an acute angle (less than 90 degrees). Obtuse Triangle: the largest of the 3 angles is an obtuse angle (more than 90 degrees).

7. Plane Figures 2. According to their sides: Equilateral Triangle: all 3 sides are the same length. Isosceles Triangle: it has 2 (or more) sides that are of equal length. (An equilateral triangle is also isosceles.) Scalene Triangle: no 2 sides are of equal measure.

8. Plane Figures The Rectangle - The  rectangle  is a shape that has 4 sides.  The distinguishing characteristic of a rectangle is that all 4 angles measure 90 degrees.

9. Plane Figures The Rhombus  - The  rhombus  is a shape formed by 4 straight lines. Its 4 sides measure the same length but, unlike the rectangle, any of all 4 angles measure 90 degrees.

10. Plane Figures The Square - The  square  is a type of rectangle, but also a type of rhombus. It has characteristics of both of these. That is to say, all 4 angles are right angles, and all 4 sides are equal in length.

11. Plane Figures The Trapezoid - The  trapezoid  also has 4 sides.  It has two sides that are parallel but the other 2 are not.

12. Evaluation: Directions: Read the questions carefully and provide what is being asked in each number. Put your answer in the space provide. 1 .  Name the following shapes or plane figurers :  

13. 2. Define the following and draw their shapes: Triangle Square Rectangle Circle

14. 3. Write the names of two objects whose shapes are: Circular (like a circle) Triangular (like a triangle) Square Rectangular (like a rectangle)

15. 4. Write the names of the shapes of the following shapes: Page of a book Surface of a postcard Surface of a scale

16. d) Shape of a handkerchief e) Surface of one-rupee coin g) Surface of an I ndian bread