Area Perimeter

Area: Space occupied by a shape inside it’s boundary. Perimeter: Walking distance along the boundary of the  shape. π [Pi] (Mathematical Constant) = 3.14 or ⁠22/7 Shapes can be square, rectangle, triangle, circle & others. There are many other shapes, which...

Boat & Stream

Upstream: Boat is moving against the direction of water. Suppose, u is the speed of boat in still water & v is the speed of stream, then: Upstream Speed (x) = u – v Downstream: Boat is moving along the direction of water. Suppose, u is the speed of boat in...

Types of Triangle

Equilateral Triangle: AB=BC=AC (all 3 sides of a triangle are equal) Isosceles Triangle: AB=AC or AB=BC or BC=AC (any 2 sides of a triangle are equal) Scalene Triangle: None of the sides of a triangle are equal Acute-Angled Triangle: a<90°, b<90°, c<90° (all...