Find the area of a rhombus, to the nearest square centimeter, whose diagonals have a length of 40 centimeters and 26 centimeters.

520 square centimeters

1,040 square centimeters

260 square centimeters

Question

Find the area of a rhombus, to the nearest square centimeter, whose diagonals have a length of 40 centimeters and 26 centimeters.



520 square centimeters

1,040 square centimeters

260 square centimeters

anonymous · Answer

can you help

cwrw238 · Answer

|dw:1414071083293:dw|

cwrw238 · Answer

the diagonals of a rhombus bisect eacah other and are also perpendicular so you have a right angles triangle as  shown with legs of 13 and 20 cms length

anonymous · Answer

i figured out how to do it i did it on a caculator 40*26 = 1,040

cwrw238 · Answer

good work

anonymous · Answer

try it on a caculator

cwrw238 · Answer

lets look again ii think i made a false assumption there

cwrw238 · Answer

my diagram is not to scale - how did you work it out?

cwrw238 · Answer

oh  40 * 26?

cwrw238 · Answer

- I was trying to work it out from first principles - i just checked out the formula 
its 1/2 * product of its diagonals

so here we have  1/2 * 40 * 26  =  520 sq cms