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प्रश्न
Construct a rhombus ABCD with AB= 5.0 cm and AC= 8 cm. Draw its lines of symmetry.
उत्तर
Steps of construction :
(i) Draw a line segment AB = 5 cm
(ii) With A as centre and radius 8 cm, and 8 as centre and radius 5 cm, draw arcs which intersect each other at C.
(iii) Join AC and BC.
(iv) Again with centre A and C and radius 5 cm, draw arcs which intersect each other at D
(v) Join AD and CD. ABCD is the required rhombus.
(vi) Join BO.
Two diagonals AC and BO are the lines of symmetry .
APPEARS IN
संबंधित प्रश्न
Use a graph paper to answer the following questions (Take 1 cm = 1 unit on both axes)
1) Plot A(4,4), B(4,-6) and C(8,0), the vertices of a triangle ABC.
2) Reflect ABC on the y-axis and name it A’B’C’.
3) Write the coordinates of the images A’, B’ and C’.
4) Give a geometrical name for the figure AA’ C’ B’ BC.
5) Identify the line of symmetry of AA’ C’ BC’.
Complete the following figure, about the given lines of symmetry which are shown by dotted lines and name the figure thus obtained:
Complete the following figure, about the given lines of symmetry which are shown by dotted lines and name the figure thus obtained:
Given below are part of a geometrical figure. Complete the figure so that both axes are lines of symmetry.
Draw and answer the following.
A triangle which has only one line of symmetry
Think of all 2, 3 and 4 digit numbers which look the same on half a turn.
Example
- 2 digit numbers 11, ______, ______
- 3 digit numbers 101, 111, ______, ______, ______, ______, ______, ______
- 4 digit numbers 1001, 1111, ______, ______, ______, ______, ______
If an isosceles triangle has more than one line of symmetry, then it must be an equilateral triangle.
A regular octagon has 10 lines of symmetry.
Copy the triangle in the following figure on squared paper. Draw the line(s) of symmetry, if any and identify the type of triangle. (Some of you may like to trace the figure and try paper-folding first!)
Copy the triangle in the following figure on squared paper. Draw the line(s) of symmetry, if any and identify the type of triangle. (Some of you may like to trace the figure and try paper-folding first!)
