Page 13 - FLIP BOOK_TASYA NATALI SIHOMBING

4. BELAH KETUPAT

5.
A rhombus is a quadrilateral whose all sides are the same

length. It can also be said that: If a quadrilateral whose two diagonals

are perpendicular and bisect each other, then the quadrilateral is a

rhombus.

A rhombus fulfills all the properties of a parallelogram, thus a rhombus is a

parallelogram whose four sides are the same length, so it has the following
properties:

a. every angle is bisected by its diagonals,

b. the diagonals intersect perpendicular to each other, consider the image

below.

Notice the picture above is two congruent triangles, namely ABC dan

ABD below this.

a. AC = BC = AD = BD dan AB = AB

b. CAB = DAB = CBA = DBA

c. ADB = ACB

If you notice, a rhombus fulfills all the properties of a parallelogram.

Next, to find out how the properties contained in the rhombus, try to do the

following mini-lab activities!

Perimeter and Area of a Rhombus

 The area of a rhombus is half the product of the lengths of the

diagonals.

12