How to Calculate the Areas of Triangles and Quadrilaterals
The area of a triangle is half the base times the height. For a quadrilateral, split it into triangles or use the formula for its type, since a trapezoid, parallelogram, and rhombus each have their own shortcut. Worked examples: areas of triangles and quadrilaterals Practice questions on triangle and quadrilateral area Determine the area of […]
How to Perform Scalar Multiplication
Scalar multiplication means multiplying every entry of a vector or matrix by the same number, called the scalar. For example, 3 × (2, −1) = (6, −3), and 2 × [[1, 4], [0, 3]] = [[2, 8], [0, 6]]. Multiplying a vector by a positive scalar stretches or shrinks it; a negative scalar also reverses […]
