Answer:

It produces numerous physical and mental symptoms which vary accordins

Fever

Explanation:

Upset stomach,including diarrhoea,constpation,and nasea is a symptom of:

Nature

Personal

Energy

Physical

Answer:

16. c

17. b

18. b

19. d

20. d

Explanation:

16)

Given that

ABCD is a Parallelogram

Angle B = 100°

angle C = x°

We know that

The adjacent angles are supplementary in a Parallelogram

=> angle B + angle C = 180°

=> 100°+x° = 180°

=> x° = 180°-100°

=> x° = 80°

The value of x° = 80°

17)

In the given Parallelogram

We know that

The adjacent angles are supplementary in a Parallelogram

x+50° = 180°

=> x° = 180°-50°

=> x° = 130°

and x and z are the corresponding angles

so they must be equal

=> x = z

=> z = 130°

The value of z = 130°

17)

Given figure is a rhombus

We know that

The diagonals bisect each other at 90°

x = 90°

We know that

The sum of the angles in a triangle is 180°

=> x+y+30° = 180°

=> 90°+y+30° = 180°

=> y+120° = 180°

=> y = 180°-120°

=> y = 60°

The value of y = 60°

19)

Given figure is a Parallelogram

We know that

The opposite angles in a Parallelogram are equal

=> y = 80°

We know that

The adjacent angles are supplementary in a Parallelogram

=> x+y = 180°

=> x+80° = 180°

=> x = 180°-80°

=> x = 100°

and 80° and z are the corresponding angles

so they must be equal

=> z = 80°

Now,

x+y+z = 100°+80°+80°

=> 260°

The value of x+y+z is 260°

20)

Given figure is paralellogram

We know that

The adjacent angles are supplementary in a Parallelogram

=> 40°+z +112° = 180°

=> z+152° = 180°

=> z = 180°-152°

=> z = 28°

The value of z = 28°

Used formulae:-

→ The adjacent angles are supplementary in a Parallelogram.

→ corresponding angles are equal.

→ The opposite angles in a Parallelogram are equal.

→ The diagonals bisect each other at 90°