Wednesday

October 1, 2014

October 1, 2014

Posted by **chinnu** on Wednesday, August 31, 2011 at 2:54pm.

(A) 9cm

(B) 128cm

(C) 80cm

(D) 56cm

plz do explain how to find.

thank you

- maths -
**Ms. Sue**, Wednesday, August 31, 2011 at 3:10pmA rhombus is made up of four right angle triangles.

http://www.coolmath.com/reference/rhombus.html

The two sides of each triangle are 12 cm and 16 cm.

Use the Pythagorean Theorem to find the hypotenuse of each triangle, which is also the side of the rhumbus.

a^2 + b^2 = c^2

12^2 + 16^2 = c^2

144 + 256 = c^2

400 = c^2

20 = c

4 * 20 = perimeter of rhombus

**Answer this Question**

**Related Questions**

geometry - The diagonals of a rhombus are in 2:1. If the perimeter of the ...

Math - Which of the following statements is not always true? A. In a rhombus, ...

Maths - The diagonals of a rhombus are 320mm and 240mm in length.Find the angles...

math PLEASE HELP - 1. A rhombus has a perimeter of 96, and the length of one of ...

math - The diagonals of a rhombus have lenghts 16 and 30. Find the perimeter of ...

easy GEOMETRY!! - 1.The perimeter of parallelogram QUAD is 10 more than 5 times ...

geometry - A rhombus has a diagonals of length 4 and 10. Find the angles of the ...

geometry - lengths of diagonals of a rhombus are 12 cm and 16 cm respectively. ...

geometry - The length of the smaller of the two diagonals of a rhombus is 12 and...

maths - the diagonals of a rhombus are 24 meter and 18 meter find the area,...