Page 110 - Start Up Mathematics_6

(d) Cuboid (iii)

Box
Matchbox

(e) Pyramid (i)

Egyptian pyramid
Pyramidical paper weight

EXERCISE 5.4
1. Name two objects that we see around us in the form of a:

(a) Cube (b) Cuboid (c) Cone (d) Sphere (e) Cylinder
2. What is the shape of the following:
(a) Football (b) C.P.U. (c) Ice cream cone (d) Die
(e) TV box (f) Dictionary (g) Steel almirah (h) A road roller

MATHS LAB ACTIVITY

Objective: To learn about rhombus and its properties
Material required: White sheet of paper, a pencil, a ruler
Demonstration:

Step 1: Take a rectangular sheet of paper and fold it in the middle to form a crease.
Step 2: Fold the paper once again to get 4 layers.

B B

A A

Step 3: Draw a line AB as shown in the figure and fold this 4 layered paper along this line.

Step 4: Unfold the paper to its original shape. Can you locate a rhombus? Mark its vertices
as P, Q, R and S.
Observation: P

(i) Is PQ = QR = RS = SP? S O Q
(ii) Is OP = OR, OS = OQ?

(iii) Is PR perpendicular to SQ? R
State the properties of rhombus which can be inferred from the above observations.

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