SCERT AP 7th Class Maths Solutions Pdf Chapter 12 Symmetry Ex 12.1 Textbook Exercise Questions and Answers.

## AP State Syllabus 7th Class Maths Solutions 12th Lesson Symmetry Ex 12.1

Question 1.

Draw the possible line(s) of symmetry for the following figures, as shown in Figure-(i).

Answer:

Question 2.

Observe the figures with punched holes and draw the axes of symmetry.

Answer:

Question 3.

Mark the other dot to become the following dotted line in the picture as line symmetry.

Answer:

Question 4.

State the number of lines ofsyrnrnetry for the following figures and draw them.

(i) An equilateral triangle

Answer:

Number of lines of symmetry for an equilateral triangle is 3.

(ii) An isosceles triangle

Answer:

Number of lines of symmetry for an isosceles triangle is 1.

(It is the altitude on the unequal side)

(iii) A scalene triangle

Answer:

We cannot draw the line of symmetry for scalene triangle.

Question 5.

Construct an equilateral triangle with a length of side 4cm and draw all possible lines of symmetry (No need to write the steps of constructions).

Answer:

∆ADI is an equilateral triangle.

Number of lines of symmetry for an equilateral triangle is 3.

Question 6.

Construct the triangle with the base 4.5cm and base angle 45° each. Draw all possible lines of symmetry (No need to write the steps of constructions).

Answer:

∆SRI is an isosceles triangle.

Number of lines of symmetry for an isosceles triangle is 1.