Iwill give 25 points and brainy from right answers ( answer

(use the first picture) 1. which pair of angles is a liner pair?

a. "angle" kre and "angle" ert

b. "angle" ert and "angle" mrc

c. "angle" mrc and "angle" krm

d. "angle" krc and "angle" crh

(use second image) 2. the lines intersect at point h

find m"angle"bhr

a. 40°

b. 50°

c. 85°

d. 90°

(use third image) 3. the lines intersect at point m.

what is the value of x?

a. 20

b. 35

c. 105

d. 128

4. an angle measures at 41°. what is the measure of its complement ?

a. 39°

b. 49°

c. 129°

d. 139°

( answer

1.D

2.A

3.B

4.

Step-by-step explanation:

1.We have to find he pair of linear angles

From given figure

Hence, option D is true.

2.We have to find the angle BHR

substitute the value of x

Then

Hence,

Option A is true.

3.We have to find the value of x

(vertical angles are equal )

Hence, the value of x=35

Option B

4.We are given that an angle measure

We have to find the value of its complement

We know that complete angles sum is equal to 90 degrees

Therefore,  complement =90-41=[/tex]49^{\circ}[/tex]

Hence, the complement of 41 degrees is 49 degrees.

Option B

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.