Explanation

• Prepositions are used to connect words and show relationships.
• The phrase “afraid” is commonly used to show fear.
• The correct preposition after “afraid” is “of”.
• It is used to express fear of a person, thing, or situation.

Last verified on 04-05-2026

Explanation

The sum of all interior angles in any triangle is always 180 degrees.

A fundamental rule in Euclidean geometry, regardless of the triangle's shape (e.g., right, equilateral, scalene).

This property is known as the Angle Sum Property.

Last verified on 23-05-2026

Explanation

Explanation

• The Moon's surface gravity is about 1/6th as powerful or about 1.6 meters per second.
• The Moon's surface gravity is weaker because it is far less massive than Earth.
• A body's surface gravity is proportional to its mass, but inversely proportional to the square of its radius.

Last verified on 13-03-2026

Explanation

• The word Book is the odd one out because it is a non-living, inanimate object.
• In contrast, Dog, Cat, and Cow are all living beings—specifically mammals.

Explanation

Opaque objects form sharp and dark shadows because they block all light from passing through, creating a clear and defined shadow.

Explanation

Explanation

"Rarely" means not often, which fits the contrast given by "but" in the sentence.

The sentence implies that despite being wealthy, he does not frequently help the poor.

Explanation

Uranium-235 (U²³⁵) is a fissile isotope, meaning it readily undergoes nuclear fission when struck by a neutron.

It is commonly used in nuclear reactors and atomic bombs for this reason.

Explanation

The standard form of a quadratic equation is ax^2 + bx + c = 0.

It represents a quadratic polynomial set equal to zero, where a, b, and c are constants.