Geometry is an interesting branch of math that deals with shape, size, the relative position of shapes and properties associated with them. Some common examples of shapes are:
· Circle
· Triangle
· Rectangle
· Square, and more.
We study geometry to practically deal with lengths, areas, and volumes. It becomes very easy to find the area, perimeter, or volume of any definite space using the geometrical formulas.
Terminologies for Geometry
What is Area?
Ans: Area is the amount of space inside the boundary.
What is Perimeter?
Ans: Perimeter is the definite path or boundary that surrounds the shape.
What is Volume?
Ans: Volume quantifies three-dimensional space enclosed in a closed surface like Cylinder, Cube, Sphere etc.
Difference between Area and Perimeter
All the blue part is the “Area of the Star” and the total red part is the “Perimeter of the Star”.
Basic Geometry Formulas for Kids
Using these formulas one can calculate the area, perimeter, and volume of different shapes. Let’s learn some important formulas for basic shapes.
Square
Perimeter of a square: 4 x a
Area of a square: a2
Where, a is the length of the side of the square.
Rectangle
Perimeter of a rectangle: 2(l + b)
Area of a rectangle: l x b
Where, l is the length and b is the breadth of the rectangle.
Circle
Circumference of a circle: 2πr
Area of a circle: π x r2
Where, r is the radius of the circle.
Triangle
Area of a triangle: ½ x b x h
Where, b is the length of the base and h is the length of the height of the triangle.
Cube
Surface area of a cube: 6 x a2
Volume of a cube: a3
Where, a is the length of the edge.
Cylinder
Curved surface area of a cylinder: 2πrh
Total surface area of a cylinder: 2πr (r + h)
Volume of a cylinder: πr2h
Where, r is the radius of the base and h is the height of the cylinder.
Cone
Curved surface area of a cone: πrl
Total surface area of a cone: πr (r + l)
Volume of a cone: ⅓ x πr2h
Where, r is the radius of the base and l is the slant height of the cone.
Sphere
Surface Area of a sphere: 4πr2
Volume of a sphere: 4/3 x πr3
Where, r is the radius of the sphere.
Best Online Math Tutoring Programs with TalkingChalks
See your kids developing an ambitious interest in math, scoring better in exams, and understanding even the complex concepts very easily. Enroll your kids in TalkingChalks Online Math Tutoring Programs. We offer world-class teaching and high-quality visual rich content so that math becomes a piece of cake or like a playful activity for your kids.
