Explanation

A polygon with 8 sides has 8 vertices. To form a triangle, you need to choose 3 vertices out of these 8. This can be done in:

8C3 = 8! / (3! x (8-3)!)

= 8! / (3! x 5!)

= (8 x 7 x 6) / (3 x 2 x 1)

= 56

So, 56 triangles can be formed by joining the angular points of a polygon with 8 sides.

Explanation

The Paris Peace Accords ended the active US involvement in the Vietnam War.

The agreement was signed on January 27, 1973 by the United States, North and South Vietnam, and the Provisional Revolutionary Government of the Republic of South Vietnam.

Explanation

Explanation

In indirect speech, "will" changes to "would," and "this night" changes to "that night" to reflect past reporting.

Explanation

Correct sentence:

"If he had come to me, I would have helped him."

This is intended to be a third conditional sentence

If + past perfect, would have + past participle

 The right choice ("had come") is not among the options.

Explanation

گل کھلانا کا مطلب عجیب کام کرنا ہے۔

Explanation

Intransitive verbs do not take a direct object, so they cannot be converted into passive voice.

Explanation

"Exposure" fits here as it suggests a deep familiarity and understanding of the subject.

It helped minimize students' doubts.

Explanation

Explanation

Explanation: 3.14 x 10^6 = 3.14 x 1000000 = 3140000.