# A Detailed Lesson Plan in Mathematics V by: Quinee Mae B. Tumaliuan

**Topics:**Quadrilateral, Triangle, Polygon

**Pages:**6 (642 words)

**Published:**April 16, 2013

I.Objectives

A. Visualize, identify and describe 3-4 sided polygons

B. Draw 3-4 sided polygons

C. Identify different geometric figures

D. Observe patience and discipline in doing assigned works

E. Work cooperatively and collaboratively in all activities

II.Subject Matter

Topic: Visualizing 3-4-Sided Polygons

Reference: BEC-PELC III.1

Materials: manila paper, cartolina, marker, cut-outs of polygons Strategy: Interactive Teaching Strategy

Values: Patience, Cooperation and Discipline

III.Procedure

Teacher’s ActivityPupils’ Activity

A. Preparation

Good morning class!Good morning ma’am!

B. Review

(Socialized Recitation)

Identify the following geometric figures

1. point●

2. line segment ● ●

3. ray

4. parallel lines

5. intersecting lines

6. perpendicular lines

7. right angle

8. acute angle

9. obtuse angle

10. polygon

C. Presentation

What is the figure below?A figure of a man

What particular geometricpolygons

figure is used to represent

the body parts?

What polygons can you seerhombus, rectangle,

in this picture?trapezoid, triangle

parallelogram, square

The class will be divided into 4 groups

Each group will be given envelopes containing polygons and activity card. They will follow the instructions that were written in the activity cards.

Activity card:

B. Separate the 3-sided polygons from that of the 4-sided polygons. C. Number the polygons separately as 1, 2, 3, etc.

D. Measure the length of the sides of the numbered polygons. E. Record the data

F. Tell something about the polygons based from the data.

G. Discuss you observations among the group.

D. Discussion

What do we call 3-sided

polygons?triangles

What are the kinds ofequilateral, isosceles,

polygons according to sides?and scalene

Who can draw and describe

each triangle?

What are the kinds of anglesobtuse, right and

according to angles?acute triangle

What do we call 4-sided

polygons?quadrilaterals

What are the differentrectangle, square,

kinds of quadrilaterals?rhombus, parallelogram

and trapezoid

Who can draw and describe(pupils answer)

each type of quadrilateral?

E. Generalization

Three-sided polygons are called triangles

Kinds of triangle according to sides:

1. Equilateral triangle- three sides are equal or congruent

2. Isosceles triangle-two sides are congruent

3. Scalene-no two sides are congruent

Kinds of triangle according to angles:

1. Obtuse triangle-one angle is obtuse

2. Right triangle-one angle is right

3. Acute triangle-three sides are all acute

Four-sided polygons are called quadrilaterals

1. Rectangle- has two pairs of equal opposite sides and it has four right angles 2. Square- all sides are equal and it has four right angles

3. Rhombus- has four equal sides

4. Parallelogram- has both pairs of opposite sides parallel

5. Trapezoid- it has one pair of opposite sides parallel

IV.Application

Name each triangle and write if it is equilateral, isosceles or scalene. 1. 2.

2cm4cm

3cm3cm

6cm

3cm

3.

10cm 4.4cm 4cm

6cm

8cm 2cm

Name each triangle and write if it is acute, right or obtuse.

4550

5. 6.

45

40

7. 22

8.30

28

50

130

100

Encircle the correct name to identify each quadrilateral

1.

Trapezoid

Rectangle

2.

Square

Trapezoid

3.

Rectangle

Parallelogram

4.

Rhombus

Square

5.

Parallelogrsam

Trapezoid

V.Evaluation

Match column A with column B

Column AColumn B

2. It has four equal sidesa. trapezoid

3. Three sides are congruentb. parallelogram

4. A 3-sided polygon with twoc....

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