# Welcome to Planet Infinity KHMS

## 13 October, 2010

### Finding angle

Q An angle is $14^{0}$ more than its complementary. Then the measure of the angle is

a)$38^{0}$

b) $36^{0}$

c) $76^{0}$

d) $52^{0}$

Most of students have answered a). This is not correct.

Let the angle be x, then its complement will be 90 -x.
Now, the angle is 14 degree more than the complement,
form an equaion

x = 90 - x + 14
2x = 104
x= 52

(You can orally check...52 is 14 more than (90-52 = 38))
So, the correct answer is d).

### Degree of a constant polynomial

Q The degree of a non-zero constant polynomial is

a) 1 b) -1 c) 0 d) -2

This question was there in SA1 paper for class 9.

Most of the students have selected option a). This answer is not correct.

Please note the degree of a constant polynomial is 0.

How do you write 7?

7 .$x^{0}$

So, what is its degree?

It is 0.

So, the correct choice is c).

Next time, do not commit this error.

## 10 October, 2010

### Sum of exterior angles of a polygon

What is the sum of exterior angles of a polygon?

Yes you are right!
it is 360 degrees.

## 06 October, 2010

### Activity- Talk about Math shapes

Objective: To recognise geometrical shapes and write about them.

Description of activity:
Each student is required to write his/her observations on the following shapes.

Reflective questions:
What is the complete shape?
How many different shapes are used in each shape to make it?
Write the properties of used shapes.

Make a list of Math terms used in your description.

Shape 1

Shape2
Shape 3
Shape 4