The instrument in the geometry box having the shape of a triangle is called a

1

(a)

protractor

(b)

compasses

(c)

divider

(d)

set-square

Perpendicular bisector of a line segment

1

(a)

is perpendicular to it

(b)

divides it into two equal parts

(c)

Both (a) and (b) are true

(d)

None of the above

If the diameter of a circle is 16 cm, then what will be its radius?

1

(a)

16 cm

(b)

10 cm

(c)

8 cm

(d)

None of these

A chord of a circle is a line segment with its ends point ___________.

1

(a)

circumference

The centre of the semi-circle (protractor) is called __________.

1

(a)

central point.

The line of symmetry of a line segment is the __________ bisector of the line segment.

1

(a)

perpendicular

With ruler and compasses, we can bisect any given line segment.

1

(a) False

(b) True

Two perpendiculars can be drawn to a given line from a point not lying on it.

1

(a) True

(b) False

With a given centre and a given radius, only one circle can be drawn.

1

(a) False

(b) True

Using only the two set-squares of the geometry box, an angle of 40° can be drawn.

1

(a) True

(b) False

In step 2 above, what would happen if we take radius to be smaller than half the length BC?

1

(a)

The arcs drawn with B and C as centres will not intersect each other.

Get 100 using four 9's and some of the symbols like +, ÷ x, etc.

1

(a)

99+\(\frac{9}{9}\) =100

Draw a circle with radius 3 cm and a circle with same centre and diameter 6 cm. What will be relation between the two?

2

(a)

How many lines can pass through a given point?

2

(a)

Draw a line segment \(\bar{PQ}\) = 9 cm. Mark a point X on it such that PX: XQ = 1:2. Draw a line segment \(\bar{AB}\) equal to \(\bar{XQ}\) . Measure \(\bar{AB}\).

2

(a)

What measures of angle are marked on protractor?

2

(a)

Construct \(\bar{PQ}\) of length 7 cm. From this cut-off \(\bar{PA}\) of length 3.2 cm. Measure \(\bar{QA}\)

3

(a)

Given, a circle of r = 3 cm. Draw two perpendicular diameters AB and CD. Join the endpoints of the diameters. State the name of the quadrilateral so formed.

3

(a)

How will you construct a 90° angle?

3

(a)

A boy was asked to find the LCM of 3, 5, 12 and another number. But while calculating he wrote 21 instead of 12 and yet came with the correct answer. What could be the fourth number?

3

(a)

The ratio of income to expenditure of Mr. Natarajan is 7: 5. if he saves Rs 2000 a month, what could be his income?

3

(a)

Construct \(\bar{AB}\) of length 7.8 cm. From this, cut-off \(\bar{AC}\) of length 4.7 cm. Measure \(\bar{BC}\) .

5

(a)

Draw any line segment \(\bar{PQ}\). Without measuring \(\bar{PQ}\), construct a copy of \(\bar{PQ}\).

5

(a)

Draw a circle with centre C and radius 3.4 cm. Draw any chord AB. Construct the perpendicular bisector of \(\bar{AB}\) and examine if it passes through C.

5

(a)