SaiBook.us Geometry

Lesson Example Discussion Quiz: Class Homework

Lesson

Title: Quadrilaterals (Rhombus, Square)

Grade: 6-a Lesson: S2-L5

Explanation: Hello students, let us learn a new topic in geometry today with definitions, concepts, examples, and worksheets included.

Lesson:

Definition: Rhombus

A rhombus is a four-sided figure with equal-length sides and congruent opposite sides.
Its diagonals bisect each other at a 90-degree angle.
A rhombus is a type of parallelogram where all sides are congruent.

$1$

Explanation: The diagonals of a rhombus with lengths 8cm and 6cm have an area of 24 sq.cm.

\$(A = (d1 & d2)/2)\$

Definition: Square

A square is a special type of rhombus with four equal sides and right angles.
The diagonals of a square are equal in length and divide it into four congruent triangles.

$2$

Explanation: If the length of the diagonals of a square is 10cm, then the area of the square is 50 sq.cm.

\$(A = d^2/2)\$