Worksheet Question - Understanding Elementary Shapes Class 6 Notes | EduRev
Mathematics (Maths) Class 6
Created by: Praveen KumarClass 6 : Worksheet Question - Understanding Elementary Shapes Class 6 Notes | EduRev
Ques 1: Match the column B with A and C:
| A | B | C |
| (a) Straight angle | (i) An angle whose measure is less than 90°. | (f) One fourth of a revolution. |
| (b) Right angle | (ii) An angle whose measure is between 90° and 180°. | (g) Half of a revolution. |
| (c) Acute angle | (iii) An angle whose measure is 180°. | (h) More than half a revolution |
| (d) Obtuse angle | (iv) An angle whose measure is 90°. | (i) Less than one-fourth of a revolution. |
| (e) Reflex angle | (v) An angle whose measure is between 180° and 360°. | (j) Between ¼ and ½ of a revolution. |
For example (a) → (iii) → (g)
Ans: (a) → (iii) → (g)
(b) → (iv) → (f)
(c) → (i) → (i)
(d) → (ii) → (j)
(e) → (v) → (h)
Ques 2: A sailor is rowing a boat due north. In which direction will he be rowing if he turns it through (i) a straight angle (ii) a complete angle
Ans: (i) South
(ii) North
Ques 3: You are standing in a class-room facing north. In what direction will you be facing after making a quarter turn in clockwise direction?
Ans: East
Ques 4: Write five capital letters of the English alphabet which show perpendicular lines/line segments.
Ans: E, F, H, I, J, L, T (any five)
Ques 5: Identify the following triangles according to the measurement of sides and angles given. Also mention the type of triangle:
(e.g. (1) ∆ABC is an equilateral triangle and acute angled triangle.
Ans: (1) ∆ABC: Equilateral and acute angled triangle
(2) ∆DEF: Isosceles triangle and acute angled triangle
(3) ∆GIH: Scalene triangle and right angled triangle
(4) ∆JKL: Isosceles triangle and obtuse angled triangle
(5) ∆MNO: Scalene triangle and obtuse angled triangle
(6) ∆PQR: Scalene triangle and acute angled triangle
(7) ∆STV: Isosceles triangle and right angled triangle
Ques 6: Fill in the blanks:
(a) Each angle of a rectangle is a ____________ angle.
(b) ____________ sides of a rhombus are of equal length.
(c) In a ____________, there is only one pair of parallel sides.
(d) The ____________ sides of a rectangle are equal in length.
(e) A rhombus with four right anlges is called a ____________.
(f) The polygon with least number of sides is ____________.
Ans: (a) Right angle
(b) All
(c) Trapezium
(d) Opposite
(e) Square
(f) Triangle
Ques 7: Complete the following table:
(One is done as example-sphere)
Shape | Example | Number of faces | Number of vertices | Number of Edges | |
(1) | Cuboid | — | — | — | — |
(2) | Cube | — | — | — | — |
(3) | Triangular pyramid | — | — | — | — |
(4) | Sphere | Football | No face | No vertex | No edge |
Ans:
Shope | Example | No. of Faces | No. of vertices | No. of edges |
Cuboid | Math book | 6 | 8 | 12 |
Cube | Die | 6 | 8 | 12 |
Triangular Pyramid | Egypt Pyramid | 4 | 4 | 6 |
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Learning Types of Angles using a Clock
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Types of Angles: Acute, Obtuse and Reflex Angles
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Examples: Angles - Part 1
- Video | 06:13 min
Examples: Angles - Part 2
- Video | 05:29 min
Examples: Measuring Angles
- Video | 06:26 min
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- Video | 06:27 min
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