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

the length of the diagonals of a rhombus are 24cm and 32cm. the perimeter of the rhombus is

(A) 9cm

(B) 128cm

(C) 80cm

(D) 56cm

plz do explain how to find.

thank you

- maths -
**Ms. Sue**, Wednesday, August 31, 2011 at 3:10pm
A 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, ...
- geometry - 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...
- Maths - Diagonals of a rhombus are 6cm and 8 cm. Find the length of the side of ...
- math PLEASE HELP - 1. A rhombus has a perimeter of 96, and the length of one of ...
- easy GEOMETRY!! - 1.The perimeter of parallelogram QUAD is 10 more than 5 times ...
- math - The diagonals of a rhombus have lenghts 16 and 30. Find the perimeter of ...
- geometry - 1.The perimeter of parallelogram QUAD is 10 more than 5 times AU. If ...
- geometry - A rhombus has a diagonals of length 4 and 10. Find the angles of the ...

More Related Questions