Explanation

A trigraph is a group of three letters representing one sound (phoneme).

In “light”, the letters “igh” together make the long "i" sound — a clear example of a trigraph.

Explanation

The sum of the interior angles of a polygon is given by:

(n - 2) × 180

where n is the number of sides.

For a 5-sided polygon (pentagon):

(5 - 2) × 180 = 3 × 180 = 540

Since it's a regular polygon, all interior angles are equal. To find each angle:

540 ÷ 5 = 108°

Explanation

Meat:

Chicken = 4/6 = 2/3 kg

Mutton = 2/3 kg

Beef = 5/12 kg

Total meat weight = 2/3 + 2/3 + 5/12

= (8 + 8 + 5)/12

= 21/12

= 7/4 kg

Grocery:

Sugar = 2 × 4/3 = 8/3 kg

Rice = 3 × 3/4 = 9/4 kg

Total grocery weight = 8/3 + 9/4

= (32 + 27)/12

= 59/12 kg

Total weight = Meat weight + Grocery weight

= 7/4 + 59/12

= (21 + 59)/12

= 80/12

= 20/3 kg

Explanation

Until is a subordinate conjunction that connects a dependent clause to an independent clause (e.g., "I will wait until you arrive").

At is a preposition.

And is a coordinating conjunction.

Explanation

Explanation

The structure "had + past participle" (had broken) indicates past perfect tense.

Past perfect is used for an action completed before another past event.

Explanation

Let the weak not be insulted.

In passive voice, the object ("the weak") comes first.

"Let" is used to form passive commands or requests.

Explanation

Explanation

Fixing is the process in photography that removes residual silver halide from the image.

Without fixing, silver halide remains light-sensitive and can darken the image upon further exposure.

Explanation

Present Continuous Tense:

Structure:

Subject + is/am/are + verb(-ing)

→ Describes an action happening right now.

He is writing an essay. → Present continuous