HELP with rectangles

[osbornes]

A rectangle has a length of 8cm and a diagonal of 10cm. Find the rectangle's

a. width

b. perimeter

c. area.

Help!
THANKS!
SHERI

[tkhunny]

A rectangle has a length of 8cm and a diagonal of 10cm. Find the rectangle'sYou don't have a book with formulas? I'll give you one free one, but I need to see you rwork from now on.

w = Width
l = length = 8 cm
d = diagonal = 10 cm


a. widthw^2 = d^2 - l^2, or w = sqrt(10^2 - 8^2) cm It's just the Pythagorean Theorem


b. perimeter2*w + 2*l

c. area.l*w

[osbornes]

Thanks, you are awesome :D