Question

Ratio, Proportions, and Similarity

Similar Figures

A room is 36 ft long and 18 ft wide. What is the length to width ratio?

Ms. Sue
36/18 = 2/1 = 2:1


Laruen

Ratio, Proportions, and Similarity
Similar Figures

An isosceles triangle has a base of 8 inches and legs measuring 12 inches. How wide is the base of a similar triangle with legs measuring 36 inches?
36 x 8 = 288/12 = 24

right...???
Ms. Sue
Right.
Laruen

Ratio, Proportions, and Similarity
Similar Figures

A photo that is 8 in. wide and 12 in. long is enlarged to a poster. If the width is enlarged to 24 in., what is the length of the poster?

24 x 4 = 48/12 = 4

right....????
Ms. Sue
No. That answer doesn't make any sense. The length must be a lot longer than 12 in.
Laruen
12 x 8 = 96/24 = 4

right...?
Laruen
or...

12 x 24 = 288/8 = 36
Ms. Sue
Which is the only answer that makes sense?

Laruen
the second one
Ms. Sue
Of course.
Laruen
Ratio, Proportions, and Similarity

Similar Figures

Clyde makes a copy of an 8 in. x 10 in. photo, reducing it to 3/4 of its size. What are the dimensions of the new photo?

Ok... I REALLY don't get this question..
Please help...
Ms. Sue
3/4 * 8 = 24/4 = 6

3/4 * 10 = ?

Laruen
7 1/2?
Laruen
why can you just multiply 3/4 and 10 to get the answer?

why 3/4 * 8 = 24/4 = 6...??
Ms. Sue
Because you've reduced the size to 3/4 of its original size.
Laruen
oh ok

THANK YOU! :)

please reply my other math post

thank you! :)
Ms. Sue
You're welcome.
Laruen
please reply my math post