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Mathematics 24 Online
OpenStudy (anonymous):

The perimeter of a rectangle with base 10 in. and height 13 in. is _____. Be sure to include units.

OpenStudy (anonymous):

just multiply both of them by two because there are two lengths of each

OpenStudy (anonymous):

then add them for perimeter

OpenStudy (anonymous):

so it is 20 + 26

OpenStudy (anonymous):

what would be the units?

OpenStudy (anonymous):

what does it say in the problem?

OpenStudy (anonymous):

inches!

OpenStudy (anonymous):

right!

OpenStudy (anonymous):

what about this one The area of a triangle with base 19 in. and height 11 in. is _____. Be sure to include units.

OpenStudy (anonymous):

one half the base times the height

OpenStudy (anonymous):

so 19x11

OpenStudy (anonymous):

then divide that by 2

OpenStudy (anonymous):

i got 104.5?

OpenStudy (anonymous):

well then you would be correct

OpenStudy (anonymous):

inches squared, remember the units

OpenStudy (anonymous):

ok one last one, The area of a circle with a radius of 15 in., to the nearest tenth is _____. Be sure to include units.

OpenStudy (anonymous):

now this one is a little different

OpenStudy (anonymous):

you first have to know the formula for area of a circle

OpenStudy (anonymous):

do you?

OpenStudy (anonymous):

is it pi times the radius squared?

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

lol is it?

OpenStudy (anonymous):

yes or no

OpenStudy (anonymous):

47.1?

OpenStudy (anonymous):

no you forgot to square fifteen

OpenStudy (anonymous):

so then what would it be if i squared it?

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