Explanation

Vertical angles are equal, so set up an equation:

80° = 4x

Divide both sides by 4:

x = 80° / 4

x = 20°

Explanation

Enervated means کمزوری یا تھکاوت

Lean Back means ٹیک لگاکر بیٹھنا

Explanation

Explanation

Let's denote the total number of books as x.

Hadith books = 2/5 × x = 2x/5

Remaining books = x - 2x/5 = 3x/5

Mathematics books = 3/4 × 3x/5 = 9x/20

Books on other subjects = 3x/5 - 9x/20

= (12x - 9x)/20

= 3x/20

Given that the number of books on other subjects is 642:

3x/20 = 642

x = 642 × 20/3

x = 4280

Explanation

Edward Thorndike introduced the Laws of Learning, particularly the Law of Effect, which states that behaviors followed by satisfying outcomes are more likely to be repeated.

His work laid the foundation for behaviorist theories in psychology and education, focusing on how animals and humans learn through trial and error.

Explanation

The sentence "Hurrah! We have got the prize" is an exclamatory sentence, which is used to express strong emotions such as joy, excitement, or surprise.

It is characterized by the use of words like "Hurrah", "Hurray", "Wow", and "Ah".

It is typically punctuated with an exclamation mark (!).

Exclamatory sentences are used to express sudden feelings or reactions.

Explanation

حسین کا ہم قافیہ لفظ "جبین" ہے، جو کہ دونوں الفاظ ایک ہی آواز کے ساتھ ختم ہوتے ہیں۔

جبین کا مطلب پیشانی یا ماتھا ہوتا ہے۔

Explanation

Explanation

Centrioles play a crucial role in organizing the spindle fibers during cell division, specifically in mitosis and meiosis.

They help in the formation of the spindle apparatus, ensuring proper chromosome separation.

Explanation

In a regular hexagon, all interior angles are equal. The sum of the interior angles of a hexagon is:

(6 - 2) × 180° = 720°

Since there are 6 equal angles:

Each angle = 720° / 6

Each angle = 120°