Question

answer these questions
1.how many plane surfaces are there in the cylinder
2.the base of the cone is _
3.how many corners are there in cube
4.which is the letter has many time of symmetries

Answer 1

Answer:

1.In a cylinder there are 2 plane surfaces and 1 curved surface. There are 2 edges and no vertices. The base and top of a cylinder are of the same shape (circular) and size.

2.The base of the cone is a flat face which is a circle.

3.8 corners

4.O

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Answer 2

Answer:

In each of the Questions 1 to 26, there are four options, out of which one is correct. Choose the correct one.

1. A triangle can be constructed by taking its sides as:

(a) 1.8 cm, 2.6 cm, 4.4 cm (b) 2 cm, 3 cm, 4 cm

(c) 2.4 cm, 2.4 cm, 6.4 cm (d) 3.2 cm, 2.3 cm, 5.5 cm

Solution:-

(b) 2 cm, 3 cm, 4 cm

From the rule, a triangle can be constructed when the sum of two sides is greater than the third side.

Consider the length of side 2 cm, 3 cm and 4 cm

2 + 3 = 5, 5 > 4

2 + 4 = 6, 6 > 3

3 + 4 = 7, 7 > 2

2. A triangle can be constructed by taking two of its angles as:

(a) 110o, 40o (b) 70o, 115o (c) 135o, 45o (d) 90o, 90o

Solution:-

(a) 110o, 40o

From the rule, sum of all angles of triangle is equal to 180o.

so, 110o + 40o = 150o

and the third angle = 30o

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Step-by-step explanation:

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