Question

HELP PPL!! ---->

The length of a rectangle is 7 units and its width is 5 units. What is the approximate length of the diagonal of the rectangle?


4.9 units
6 units
8.6 units
9 units

Answer 1

@Agl202

Answer 2

So what you want to use here is Pythagoras' Theorem, because you're looking at a right angled triangle.

Have you heard f Pythagoras' Theorem?

Answer 3

yes but i don't know how to use it

Answer 4

so in a rectangle you have a length of 7 and a width of 5 so your long side would by 7 units long and your short side would be 4 units long, correct?

Answer 5

Okay, so the equation is:\[c ^{2} = a ^{2} + b ^{2}\] where c is the diagonal and a and b are the other sides

Answer 6

So in this case the diagonal^2 = 7^2 + 5^2

Answer 7

@Spring98

Answer 8

oh sorry

Answer 9

so is it 4.9 units

Answer 10

@Ziploxk plz is it 4.9 units?

Answer 11

i got ~8.6 @Spring98

Answer 12

\[c^2=a^2+b^2\]

Answer 13

oh oops i did it wrong k i understand now

Answer 14

then you would square root c^2 to get c