12. While shopping online, Ji Hun finds a square rug with the area of 11m squared he needs to know if it will fit his 4m x 5m bedroom.
a) Estimate the side length to the rug to one decimal place.
sqrt 9 sqrt 11 sqrt 16
|-------|-----------------------|-----------------------------|
3 3.31 4
b) Check with a calculator.
sqrt 11 = 3.316
c) Does the rug fit? Explain.
Yes, because the room is 20m and the rug is 11m.
__________________________
| _________|____4m___ |
| | | |
| | | |
| = 4m x 5m = 20m2 = |
| | | 5m |
| | | |
| |_________|_________ | |
|__________________________|
14. Alex is thinking of a number. The number has a square root between 7 and 8 and is a multiple of 12.
a) What could he be thinking of?
sqrt 49 sqrt 60 sqrt 64
|-------------------------|---------------|----------|
7 7.74 8
b) Is there more than one answer?
No, 60 is the only number between square root that is a multiple of 12.
17. Carmen wants to mount 18cm x 18cm square board that is 4 times the area of the picture.
a) What is the area?
____________|_18cm________
| |
| | 18cm
| |
= 18 x 18 = 324cm2 =
| |
| |
| |
|__________________________|
|
b) What is the area of the board?
____________|____324cm_____
| |
| |
| | 324cm
= 324 x 324 = 104.9 =
| |
| |
| |
|__________________________|
|
c) What are the dimensions of the board?
sqrt 324 = 18cm
____________|___18cm______
| |
| |
| | 18cm
= =
| |
| |
| |
|__________________________|
|
Showing posts with label Ashlies816. Show all posts
Showing posts with label Ashlies816. Show all posts
Monday, February 13, 2012
Ashlie's Pythagorean Relationship Post
The pythagorean relationship is used for solving problems for finding the hypotenuse with 2 given legs. Also to figure out if the triangle is a right triangle or not.
1. Find The Missing Side Length.
c2 = a2 + b2
c2 = 52 + 122
c2 = (5x5) + (12x12)
c = 25cm2 + 144cm2
c = 169cm2
square root of 169 = 13cm
c = 13cm
2. Is This A Right Triangle? Show Your Work.
a2 + b2 = c2
62 + 82 = 112
(6x6) + (8x8) = (11x11)
36 + 64 = 121
100 /= 121
Not a perfect square because the legs don't make/equal the hypotenuse.
Thursday, December 15, 2011
Ashlie816 Percent Post
Estimating Percents
5. a) 48% of 102
48% is close to 50%
48% of 102 is the same as half of 102, which is 51.
b) 24% of 80
24% is close to 25%
24% of 80 is the same as 80 divided by 4, which is 20.
5. a) 48% of 102
48% is close to 50%
48% of 102 is the same as half of 102, which is 51.
b) 24% of 80
24% is close to 25%
24% of 80 is the same as 80 divided by 4, which is 20.
Wednesday, October 12, 2011
Ashlie's Proportion Post
Ratio- A comparison of two quantities that have the same unit of measurement.
Rate- A comparison of two quantities measured in different units.
Proportion- An equation that says that two ratios or two rates are equal.
Rate- A comparison of two quantities measured in different units.
Proportion- An equation that says that two ratios or two rates are equal.
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