Download 8.UNDERSTANDING ELEMENTARY SHAPES I. Choose the correct

8.UNDERSTANDING ELEMENTARY SHAPES
I. Choose the correct answer. ( Each 1M)
1.If
LM is perpendicular to PQ and intersects it at point M then find
(A) 600
2.In
(C) 1000
(D) 1800.
the given figure, lines l and m are ……………….. to each other.
(A) perpendicular
3.a)
(B) 900
(B) parallel
(C) intersect
(D) None of them.
If a clock hand starts from 12 and stops at 12 What type of angle does it make
(A) 1000
(B) 1800
(C) 2700
(D) 3600.
4.In
triangle ABC,if AB = 13cm , BC = 13 cm , CA = 5cm. Then ∆ABC is _______
(A) Isosceles triangle(B) Scalene triangle(C) Equilateral triangle (D) Right angle triangle
5.What
helps in forming the shape of all the objects around us?
(A) curves
(B) lines
(C) Both 'a' and 'b'
(D) None of them
6.What
is a line segment?
(A) A dot
(B) An unending line
7.How
(C) A fixed portion
do we find a relation between two line segments?
(A) By comparing their width
(B) By comparing their length
(C) By comparing their height
(D) None of them
(D) All of them
8.Which
of the following is correct definition of length?
(A) The distance between the centre of a circle and its circumference.
(B) The distance between the end points of a line segment.
(C) The distance covered during one revolution.
(D) None of them.
9.Top
view of a brick looks.
(A) Triangular
(B) Circular
(C) Rectangular
__________ resembles a round marble used for playing.
(A) cone
(B) cylinder
(C) sphere
(D) Square
10.A
(D) All of them
11.Name
the type of a triangle formed with lengths of sides 7 cm, 8 cm and 9 cm.
(A) Right angled triangle
(B) Isosceles triangle
(C) Scalene triangle (D) None of
them
12.If
all the angles of a triangle are equal, then its sides are _________.
(A) equal
(B) unequal (C) uneven
(D) parallel
13.What
(A)
90o
is the measure of a straight angle?
(B) 60o
(C) 180o
(D) 0o
14.An
angle whose measure is less than that of a right angle is _____________.
(A) Reflex Angle
(B) Acute Angle
(C) Obtuse Angle
(D) Straight Angle
15.Which
direction will you face if you start with facing in east and make one and a half
revolution clockwise?
(A) East
(B) West
(C) North
(D) South
16.How
many millimetres make one metre?
(A) 10 mm
(B) 100mm
(C) 1/10 mm
(D) 1000mm
17.Which
of the following are models for perpendicular lines?
(A) The adjacent edges of a table top
(B) The lines of a railway track
(C) The line segments forming the letter 'M'
(D) The letter 'V'
18.We
use a _________ to measure the size of an angle in Degrees.
(A) set square
(B) protractor
(C) ruler
(D) divider
will we name the triangle LMN with angle L= 30o, angle M= 70 and angle N= 80?
(A) Obtuse Angled Triangle (B) Acute Angled Triangle
(C) Right Angled Triangle
(D) None of them
19.What
20.Find
the number of right angles made by the hour hand of a clock when it goes from 12
o'clock to 9 o' clock.
(A) 2
(B) 3
(C) 1
(D) 4
21.Which
of the following statements are true? Choose the correct answer from the code given
below :
(i) Each angle of a square is a right angle.
(ii) All the sides of a parallelogram are of equal length.
(iii) The diagonals of a square are perpendicular to one another.
(A) Only option (i)
(B) Only (i) and (iii)
(C) Only option (ii)
22.Which
of the following lines is longest?
(A)
(B)
(C)
(D) All lines are equal
23.What
does the arrow show in the following figure?
(D) All of them
(A) Face
24.Which
(B) Edge
(C) Vertex
(D) None of them
of the following is a polygon?
(A)
(B)
25.Name
(A) (i)
(D)
the given triangle on the basis of its angles.
(A) Obtuse Angled Triangle
(C) Acute Angled Triangle
26.Which
(C)
(B) Right Angled Triangle
(D) none of them
of the following angles have a larger measure?
(B) (ii)
(C) (iii)
is the shape of cycle's Wheel?
(A) Square
(B) Rectangle
(D) All are same measure
27.What
28.A
reflex. angle > 180º and < 360º . (T/F)
(C) circle
(D) Triangle
one of the angles in a triangle is 900, then the triangle is called a/an(A) Acute-angled triangle.
(B) Obtuse-angled triangle.
(C) Right-angled triangle.
(D) None of them.
29.If
30.In
the following triangle, which of the triangles shown is an isosceles right-angled triangle?
(i) (ii)
(iii)
(A) Angle ABC
(B) Angle DEF
coin of one rupee looks like a(A) Rectangle.
(B) Square.
(C) Angle PQR
(D) none of them
(C) Circle.
(D) Triangle.
31.A
32.In
the given figure, XY is ……..
(A) Radius
(C) Half diameter
(B) Smallest chord
(D) Diameter or the greatest chord
33.Base
of the cone is in the shape of a…
(A) Rectangle
(B) Triangle
(C) Circle
(D) Square
34.Instrument
(A) Divider.
used to draw a circle is(B) Compass.
(C) Protactor.
(D) Ruler.
35.If
a triangle has two equal sides, then it is called a/an(A) Equilateral triangle.
(B) Isosceles triangle.
(C) Scalene triangle.
(D) Right-angled triangle.
36.Perimeter
of the circle is called its(A) Circumference.
(B) Diameter.
37.In
(C) Segment.
the given triangles, which triangle is an obtuse-angled triangle?
(i) (ii)
(iii)
(A) (i)
(B) (ii)
(C) (iii)
(D) Both (1) and (3).
(D) Radius.
38.Sum
(A)
of two acute angles of a right triangle is…
(B) 900
(C) 1100
(D) 800
1000
39.A
ray has ……..
(A) One end-point.
them.
(B) Two end-points.
(C) No end point.
(D) None of
40.The
standard unit for measuring an angle is……
(A) Minute.
(B) Degree.
(C) Metre
(D) None of them.
a triangle ABC, AB = 13cm , BC = 12cm, CA = 5cm and
.
Classify the triangle of the basis of sides and angle.
(A) Equilateral.
(B) Isosceles right triangle
(C) Scalene right triangle
41.In
V.Fill
(D) None
in the blanks (1M)
42. When the sum of the measures of two angles is a right angle, then each one of them is
_____ angle.
43. When the sum of the measure of two angles is a straight angle, then one of them should be
obtuse or ________
44. Triangle having two equal sides is called an _______ triangle.
45. We are facing North and we turn east clockwise, then theangle formed is _______
46. Line joining the opposite vertices of a polygon is called a _________
II. Solve the following(Each 2M)
1.Which
of the following are matching correctly?
Column A
Column B
(i)
A line segment is
(a) If they have equal length.
ii) A line segment has
(b) At a point.
(iii) Two segments are congruent
(c) A portion of the line.
(iv) Two segments may intersect
(d) Two end-points.
2.Draw
a line segment of 7.8cm
3.Draw
a line segment of 5.9cm
4.Draw
5.Find
a)
450
6.Find
a) 890
7.Find
a)
460
a line segment of 3.8cm
the complementary angles for the following
b)360
the complementary angles for the following
b)120
the supplementary angles for the following
b)1120
8.Find
the supplementary angles for the following
a) 1780
b)2400
9.Define
a) Triangle b) Isosceles triangle
10.Define
a) Scalene triangle b) Equilateral triangle
11.Define
a) Acute angle b) obtuse angle
III. Solve the following(3M)
1.The
angles of triangle are in the ratio 1:2:3 .Find the angles
2.The
angles of triangle are in the ratio 1:1:2 .Find the angles
3.Define
a)Trapezium b) Parallelogram
4.Define
a)Square b) Rectangle c)Rhombus
5.Define
a)Cube b) Cuboids c)Cone
6.How
many edges ,faces and vertices do a)cube b)Cuboid have?
7.How
many edges ,faces and vertices do a)Cylinder b)Cone have?
8.Write
true or false. Correct the statement if false.
(a) An obtuse angle < 90º .
(b) A measure of complete angle is 360º.
(c) Straight angle is between
9.Count
of a revolution.
the number of sides of the following polygons and name them
10.Define
a) Obtuse - angled - triangle
c) Acute - angled - triangle
b) Right - angled - triangle
the help of protractor draw angles of: (i) 1050 (ii) 600
and identify the angles(whether it is obtuse or acute).
11.With
Iv. Solve the following(4M)
69.Match
the following
(A)
(B)
(C)
(D)
(E)
70.Match
the following
Column - 1
Column - 2
(i)
3 sides of equal length
(ii)
2 sides of equal length
(iii)
All sides of different lengths
(iv)
3 acute angles
(v)
1 right angle
(vi)
1 obtuse angle
(vii) 1 right angle with 2 sides of equal length
(viii) a closed three sided polygon
71.Match
(a) scalene triangle
(b) Isosceles right angled
(c) obtuse angled
(d) right angled
(e) Equilateral
(f) Acute angled
(g) triangle
(h)isocelese
of the following -:
Column A
Column B
(A) Cone
(i)
(B) Pyramid
(ii)
(C) Sphere
(iii)
(D) Cylinder
(iv)
72.Match
of the following -:
Column A
Column B
(A) All the three sides of a triangle are of unequal length. (i) Rectangle
(B) Parallelogram with all angles 90o is
(ii) Equilateral Triangle
(C) All the three sides of a triangle are equal.
(iii) Parallelogram
(D) A quadrilateral having two pairs of parallel sides.
(iv) Scalene Triangle