Exercise 22A
Question 1
1. Write 'T' for True or 'F' for False.
(i) A scalene triangle has no line of symmetry.
(ii) An isosceles triangle with more than one line of symmetry is an equilateral triangle.
(iii) A right-angled triangle can have at the most one line of symmetry.
(iv) A right-angled triangle with more than one line of symmetry is an equilateral triangle.
(v) A pentagon which has more than one line of symmetry must be regular.
(vi) A regular hexagon has only one line of symmetry.
2. If the shape is cut along the dashed line, will the two parts fit if we flip one over on top of the other?
<img>
3.Write $\mathrm{S}$, if the shape is symmetrical about the dashed line or NS, if it is not symmetrical.
<img>
Multiple Choice Questions.
Tick (✔) the correct option in question 4 to 7 .
4. How many lines of symmetry are there in a rectangle that is not a square?
(a) 1
(b) 2
(c) 4
(d) 6
5. How many lines of symmetry does the given flower have?
(a) 4
(b) 3
(c) 5
(d) 6
6. How many lines of symmetry does a regular pentagon have?
(a) 1
(b) 2
(c) 4
(d) 5
7. Which of the following letters does not have a vertical line of symmetry?
(a) $\mathrm{M}$
(b) $\mathrm{H}$
(c) $E$
(d) $V$
8. Draw the line (or lines) of symmetry of the following shapes and count their number.
<img>
9.Draw the line/lines of symmetry in the following letters of the English alphabet.
<img>
10. Draw a line of symmetry for the word DOCK.
11. Do your body and face appear to have a vertical line of symmetry or a horizontal line of symmetry?
12. Nirja says that the diagonals of a rectangle are also the lines of symmetry. Do you agree? Explain,
13. Construct a line segment $6.8 \mathrm{~cm}$ long. Construct its line of symmetry.
14. Draw an angle measuring $75^{\circ}$ with equal arms. Construct its line of symmetry.
No comments:
Post a Comment