Polygon

Q.

Who is the father of mathematics?

Q. How many triangles make up a quadrilateral?

1. 2
2. 3
3. 4
4. infinite

Q. How many diagonals does a polygon with 5 sides have?

1. 5
2. 4
3. 6
4. 3

Q.

The sum of all the interior angles of a decagon is ___.

1. 960${}^{\circ }$

2. 1440${}^{\circ }$

3. 1000${}^{\circ }$

4. 1200${}^{\circ }$

Q.

What is the symbol of a diagonal?

Q.

If the ratio between the interior and exterior angles of a regular polygen is 8:1, then the polygen has - sides.

1. 18

2. 24

3. 28

4. 36

Q. A ___ is a closed figure formed by straight lines or straight sides.

Q.

The measure of each interior angle of a regular 18 - sided polygon is ___

1. ${120}^{\circ }$

2. ${150}^{\circ }$

3. ${160}^{\circ }$

4. ${170}^{\circ }$

Q.

Each interior angle of a regular polygon of 18 sides , is

1. $144°$

2. $160°$

3. $60°$

4. $120°$

Q.

If in a polygon there are 5 right angles and the remaining angles are equal to 195° each, then the number of sides is

1. 14

2. 12

3. 11

4. 10

Q.

Which one of the following is a regular polygon?

1. Trapezium

2. Rectangle

3. Isosceles triangle

4. Square

Q. How many sides does a hexagon have ?

1. 7
2. 5
3. 8
4. 6

Q.

Can you identify the branch of mathematics which deals with the measurement of geometrical shapes and figures?

1. Algebra

2. Metrology

3. Mensuration

4. Arithmetic

Q.

IF the sum fo the interior angles of a polygon is 3240, then it has - sides

1. 

2. 

3. 

4. 

Q.

The three angles of a quadrilateral are ${40}^{\circ },{80}^{\circ },{90}^{\circ }$. The fourth angle is:

1. 

2. 

3. 

4. 

Q. In a polygon of 5 sides, the positions of 2 adjacent sides are changed such that they form a line segment. How many sides will the resulting polygon have?

1. 3
2. 4
3. 5
4. 6

Q.

Question 1 (c)

Examine whether the following is a polygon. If it is is not, say why?

Q.

The measures of all the angles in the given figure is

1. ${85}^0,{50}^0,{135}^0,{130}^0$

2. ${80}^0,{55}^0,{130}^0,{135}^0$

3. ${75}^0,{60}^0,{125}^0,{40}^0$

4. ${95}^0,{45}^0,{115}^0,{40}^0$

Q. If a regular polygon has 10 sides, then the measure of its each interior angle is ___.

1. 150
2. 162
3. 144
4. 120

Q.

The process of estimation of the quantity of a physical entity is known as __.

Q.

Can errors in a measurement be avoided? If not why?

Q.

In the figure, a regular octagon and a regular pentagon are put together. The measure of ∠ABC is

117∘

127∘

107∘

171∘

Q. 1)In abc, AD perpendicular BC and BE perpendicular to AC.If BC=16cm, AD=6cm and BE=8cm , then find AC.

Q. Round upto three significant figure ? 1] 34.216 2] 10.4107 3] 0.04597 4]2808

Q.

The ratio between the exterior angle and the interior angle of a regular polygon is 1 : 5, then it has___ sides.

1. 8

2. 12

3. 6

4. 10

Q. What is the least number of sides a polygon can have, such that the number of diagonals is greater than the number of sides?

1. 5
2. 6
3. 4
4. 7

Q. The given figure is a polygon.

1. False
2. True

Q. Which side is opposite to side AB?

1. EF
2. ED
3. BC
4. DC

Q.

Find the measure of each interior angle of a $10$ sided regular polygon.

Q.

State true or false.
The definition of a polygon is a closed figure formed by straight lines or straight sides.

1. True

2. False