osbornes

09-16-2005, 03:06 PM

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

a. width

b. perimeter

c. area.

Help!

THANKS!

SHERI

View Full Version : HELP with rectangles

osbornes

09-16-2005, 03:06 PM

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

a. width

b. perimeter

c. area.

Help!

THANKS!

SHERI

tkhunny

09-16-2005, 03:27 PM

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

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

09-16-2005, 03:55 PM

Thanks, you are awesome :D

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