Explanation

The three interior angles of every triangle always add up to 180 degrees

Basic Geometry Formulas

Triangle

• Area = ½ × Base × Height
• Perimeter = a + b + c
• Sum of angles = 180°

Rectangle

• Area = Length × Width
• Perimeter = 2(Length + Width)

Square

• Area = Side²
• Perimeter = 4 × Side

Circle

• Area = πr²
• Circumference = 2πr

Triangle angle

• Interior angles = 180°

Last updated by NA on 09-09-2026

Explanation

• The primary colors of white light are Red, Green, and Blue (RGB).
• White light is produced when these three colors of light combine in equal amounts.
• This is called the additive color model.
• RGB is used in screens, televisions, and digital displays.

Additional information:

The primary colors of Pigment is:

• Red
• Yellow
• Blue

Last verified on 25-06-2026

Explanation

Elements or compounds that combine in a chemical reaction are called reactants.

Explanation

The pH of pure water (H20) is 7 at 25 °C

pH stands for "Potential Hydrogen"

Explanation

• Chemical digestion of proteins begins in the stomach
• Mechanical digestion (chewing) starts in the mouth,
• The chemical breakdown requires gastric juices, specifically hydrochloric acid (HCL)
• The enzyme pepsin activates and breaks down protein molecules.

Last updated by NS on 20-April-2026

Explanation

• Oxygen has 8 protons and typically 8 neutrons, giving it a mass number of 16.
• Mass number = Number of protons + Number of neutrons.
• Discoverers: Joseph Priestley, Carl Wilhelm Scheele
• Symbol: O
• Atomic number: 8
• Electrons per shell: 2, 6
• Discovered: 1774

Explanation

Evaporation is the process where liquid turns into gas at temperatures below its boiling point.

It occurs at the surface of the liquid.

It is influenced by factors like temperature and surface area.

Explanation

Garbage means کچرا

Litter means گندگی

Explanation

Laugh is an intransitive verb and does not take any object.

Laughed is the second and third form of Laugh.

Explanation

"Or" is used to show a choice or alternative between two options: hardworking or lazy.

The sentence is asking which one applies, not contrasting or adding, so "or" fits best.