Class 07 Congruence of triangles fly in air

 

CONGRUENCE OF TRIANGLES

 

ACTIVITY – 1. Fly in Air

DATE:

 

AIM / Objective:

To draw and find the congruence of triangles

 

MATERIALS REQUIRED:

Pencil, scale, eraser

 

PREREQUISITE KNOWLEDGE:

Concept of Congruence of triangles

 

PROCEDURE:

 

Description: Let ABC = RQP

Draw these 2 triangles using same colour. Cut out these triangles and paste on appropriate position for aero plane wings as given in the figure below.

LEARNING ASSESSMENT:

 

How many more congruent triangles can be drawn in the given figure. Draw them

 

SOLUTION:

I can draw _____ congruent triangles in the given figure.

Class 07 The triangles and their properties fun with matchsticks

 

TRIANGLES AND THEIR PROPERTIES

 

ACTIVITY –3. Fun with match sticks

DATE:

 

AIM / Objective:

To form a triangles using matchsticks

 

MATERIALS REQUIRED:

Pencil, scale, eraser

 

PREREQUISITE KNOWLEDGE:

Concept of triangles

 

PROCEDURE:

Description:

Take 3 sets of match sticks as mentioned below.

Set A – [1 stick, 2 sticks, 3 sticks]

Set B – [2 sticks, 2 sticks, 5 sticks]

Set C – [3 sticks, 4 sticks, 5 sticks]

Taking sticks (as mentioned above) as length of sides of triangle,

 

LEARNING ASSESSMENT:

 

try to form triangle for each set. Note down your observations.

 

SOLUTION:

Class 07 The triangles and their properties triangle crossword puzzle

 

TRIANGLES AND THEIR PROPERTIES

ACTIVITY –2. Triangle crossword puzzle.

DATE:

AIM / Objective:

To solve the puzzle

MATERIALS REQUIRED:

Pencil, scale, eraser

PREREQUISITE KNOWLEDGE:

Concept of triangles

PROCEDURE:

Description: A crossword with clues will be given to the students.

Across:

1. A triangle with all sides equal.

4. A triangle with unequal sides.

6. The sides of the right triangle other than hypotenuse.

8. The property which says  =  +

9. Distance of a vertex of a triangle to its opposite base.

Down:

2. Side opposite to the right angle of a right triangle.

3. A triangle in which two sides are equal.

5. A line segment drawn perpendicular to one side of a triangle from its opposite vertex.

7. The line segment joining the midpoint of one side of a triangle to its opposite vertex.

 

LEARNING ASSESSMENT:

Solve the puzzle

 

SOLUTION:

1. EQUILATERAL   2.HYPOTENUSE

4. SCALENE          3.ISOSCELES

6. LEGS                 5.ALTITUDE

8. PYTHAGORAS   7. MEDIAN

9. HEIGHT

Class 07 The triangles and their properties direction of triangle

 

TRIANGLES AND THEIR PROPERTIES

 

ACTIVITY –1.  Direction of triangle

DATE:

 

AIM / Objective:

To find the median, altitude and centroid of a triangle

MATERIALS REQUIRED:

Pencil, scale, eraser

 

PREREQUISITE KNOWLEDGE:

Concept of triangles

 

PROCEDURE:

Description: Draw two different scalene triangles.

1. Draw median with red colour.

2. Draw altitude with green colour.

3. Draw angle bisector of any one angle with blue colour.

4. Draw perpendicular bisector of any one side with orange colour.

Label the figures completely.

LEARNING ASSESSMENT:

Draw and label the median, altitude, angle bisector and perpendicular bisector.

 

SOLUTION:

 

Class 07 The triangles and their properties Exterior property of a triangle

 

TRIANGLES AND THEIR PROPERTIES

ACTIVITY –1. Exterior property of triangle

DATE:

AIM / Objective:

To find a exterior property of a triangle

MATERIALS REQUIRED:

Pencil, scale, eraser

PREREQUISITE KNOWLEDGE:

Concept of exterior property of triangles

PROCEDURE:

Description: An exterior angle of a triangle is formed when a side of a triangle is produced.

At each vertex you have 2 ways of forming an exterior angle.

LEARNING ASSESSMENT:

 

SOLUTION:

Class 07 The triangles and their properties Angle sum property of a triangle

 

TRIANGLES AND THEIR PROPERTIES

 

ACTIVITY –1.  Angle sum property of a triangle

DATE:

 

AIM / Objective:

To prove the angle sum property

MATERIALS REQUIRED:

Pencil, scale, eraser

PREREQUISITE KNOWLEDGE:

Concept of triangles

PROCEDURE:

Description: the sum of measure of all the angles of a triangle is 180°.

LEARNING ASSESSMENT:

 

SOLUTION:

 

 

Class 07 Lines and angles the angle grid

 

LINES AND ANGLES

 

ACTIVITY –2. The angle grid

DATE:

 

AIM / Objective:

To identify the angles and their properties

 

MATERIALS REQUIRED:

Pencil, scale, eraser

 

PREREQUISITE KNOWLEDGE:

Concept of angles and their properties

 

PROCEDURE:

Description:

1. The students will be given a grid with 9 pairs of angles with their properties, written randomly.

2. The students will cut out the given grid into 18 triangular pieces and arrange them pair wise to form 9 squares i.e. each paper of angles with its identification

criteria.

3. Now the students will arrange the 9 squares to form a (3 x 3) grid.

 

LEARNING ASSESSMENT:

Arrange the squares to form a grid

SOLUTION: