![Page 1: Area Day 2 Math 10-3 Ch. 3 Measurement. Ex1. Determine the area of the following shape. *First, find the formula for the area of a TRIANGLE: Area triangle](https://reader035.vdocuments.us/reader035/viewer/2022072011/56649e385503460f94b28fc7/html5/thumbnails/1.jpg)
Area Day 2
Math 10-3
Ch. 3 Measurement
![Page 2: Area Day 2 Math 10-3 Ch. 3 Measurement. Ex1. Determine the area of the following shape. *First, find the formula for the area of a TRIANGLE: Area triangle](https://reader035.vdocuments.us/reader035/viewer/2022072011/56649e385503460f94b28fc7/html5/thumbnails/2.jpg)
Ex1. Determine the area of the following shape.
*First, find the formula for the area of a TRIANGLE: Area triangle = b x h
Fill in the formula with the information from the diagram.
ATri = x 8 ft x 3 ft
Now solve. *remember, multiplying by is the same as dividing by 2!
8 x 3 2 = 12 ft2
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Ex2. Determine the area of the following shape.
*First, find the formula for the area of a PARALLELOGRAM: Area Parallelogram = b x h
Fill in the formula with information from the diagram:
Ap = b x h = 12 cm x 7 cm = 84 cm2
![Page 4: Area Day 2 Math 10-3 Ch. 3 Measurement. Ex1. Determine the area of the following shape. *First, find the formula for the area of a TRIANGLE: Area triangle](https://reader035.vdocuments.us/reader035/viewer/2022072011/56649e385503460f94b28fc7/html5/thumbnails/4.jpg)
Ex3. Determine the area of the following shape.
First, find the formula for the area of a TRAPEZOID: Area Trapezoid = (b1+b2) x h
Fill in the formula with information from the diagram:
ATrap = (9 mm + 4 mm) x 3 mm
*First, you must add (9 + 4) because they are in BRACKETS. Remember BEDMAS?
9 + 4 = 13 13 x 3 2 = 19.5 mm2
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![Page 5: Area Day 2 Math 10-3 Ch. 3 Measurement. Ex1. Determine the area of the following shape. *First, find the formula for the area of a TRIANGLE: Area triangle](https://reader035.vdocuments.us/reader035/viewer/2022072011/56649e385503460f94b28fc7/html5/thumbnails/5.jpg)
Ex4. The area of a triangle is 12 in2. If the base of the triangle is 6 in long, what is the height of the triangle?
ATriangle = 12 in2 b = 6 in h = ?
We are looking for the height!
Fill in the formula for area of a triangle with what we already know:
ATriangle = b x h 12 in2 = 6 in x h 2 What is the opposite of dividing by 2? Multiply by 2 on the other side!
12 x 2 = 6 x h 24 = 6 x h
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![Page 6: Area Day 2 Math 10-3 Ch. 3 Measurement. Ex1. Determine the area of the following shape. *First, find the formula for the area of a TRIANGLE: Area triangle](https://reader035.vdocuments.us/reader035/viewer/2022072011/56649e385503460f94b28fc7/html5/thumbnails/6.jpg)
Ex4. The area of a triangle is 12 in2. If the base of the triangle is 6 in long, what is the height of the triangle?
24 = 6 x h
What is opposite of multiplying by 6? Divide by 6 on the other side!
24 6 = h
h = 4 in
Double check to make sure:
ATriangle = b x h = 6 x 4 2 = 12 in2
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![Page 7: Area Day 2 Math 10-3 Ch. 3 Measurement. Ex1. Determine the area of the following shape. *First, find the formula for the area of a TRIANGLE: Area triangle](https://reader035.vdocuments.us/reader035/viewer/2022072011/56649e385503460f94b28fc7/html5/thumbnails/7.jpg)
Ex5. The area of a square is 16 cm2. What is the length of one side?
Fill in the formula for area of a square with what we already know:
ASquare = s2
16 cm2 = s2
But we don’t want s2 we want just s !
What is the opposite of squaring something? Square rooting!
![Page 8: Area Day 2 Math 10-3 Ch. 3 Measurement. Ex1. Determine the area of the following shape. *First, find the formula for the area of a TRIANGLE: Area triangle](https://reader035.vdocuments.us/reader035/viewer/2022072011/56649e385503460f94b28fc7/html5/thumbnails/8.jpg)
Find the button on your calculator. This is the operation you use to “un-square” a number.
16 = s2
= s
s = 4 cm
Double check to make sure:
Asquare = s2 = s x s = 4 x 4 = 16 cm2
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![Page 9: Area Day 2 Math 10-3 Ch. 3 Measurement. Ex1. Determine the area of the following shape. *First, find the formula for the area of a TRIANGLE: Area triangle](https://reader035.vdocuments.us/reader035/viewer/2022072011/56649e385503460f94b28fc7/html5/thumbnails/9.jpg)
How do we convert between SI square units?
Remember, the SI measuring system is based on 10.
![Page 10: Area Day 2 Math 10-3 Ch. 3 Measurement. Ex1. Determine the area of the following shape. *First, find the formula for the area of a TRIANGLE: Area triangle](https://reader035.vdocuments.us/reader035/viewer/2022072011/56649e385503460f94b28fc7/html5/thumbnails/10.jpg)
Ex6. 8 m2 is how many cm2?
HAVE m2 WANT cm2
Start at m2 and follow the arrows to cm2 we have to multiply by 102 twice!
*Remember 102 is the same as 10 x 10 !
8m2 x 102 x 102 = 8 m2 x 10 x 10 x 10 x 10 = 80000 cm2
![Page 11: Area Day 2 Math 10-3 Ch. 3 Measurement. Ex1. Determine the area of the following shape. *First, find the formula for the area of a TRIANGLE: Area triangle](https://reader035.vdocuments.us/reader035/viewer/2022072011/56649e385503460f94b28fc7/html5/thumbnails/11.jpg)
Ex7. 350 mm2 is how many dm2?
HAVE mm2 WANT dm2
Start at mm2 and follow the arrows to dm2 we have to divide by 102 twice!
350mm2 102 102 = 350 10 10 10 10 = 0.035 dm2
![Page 12: Area Day 2 Math 10-3 Ch. 3 Measurement. Ex1. Determine the area of the following shape. *First, find the formula for the area of a TRIANGLE: Area triangle](https://reader035.vdocuments.us/reader035/viewer/2022072011/56649e385503460f94b28fc7/html5/thumbnails/12.jpg)
How do we convert between Imperial square units?
Remember, the Imperial Measurement System is based on referents!
![Page 13: Area Day 2 Math 10-3 Ch. 3 Measurement. Ex1. Determine the area of the following shape. *First, find the formula for the area of a TRIANGLE: Area triangle](https://reader035.vdocuments.us/reader035/viewer/2022072011/56649e385503460f94b28fc7/html5/thumbnails/13.jpg)
Ex8. 9 yd2 is how many in2?
HAVE ft2 WANT in2
Start at yd2 and follow the arrows to in2 We have to x 32 and then 122 !
9 yd2 x 32 x 122 = 9 yd2 x 3 x 3 x 12 x 12 = 11664 in2
![Page 14: Area Day 2 Math 10-3 Ch. 3 Measurement. Ex1. Determine the area of the following shape. *First, find the formula for the area of a TRIANGLE: Area triangle](https://reader035.vdocuments.us/reader035/viewer/2022072011/56649e385503460f94b28fc7/html5/thumbnails/14.jpg)
Ex9. 2 016 in2 is how many ft2 ?
HAVE in2 WANT ft2
Start at in2 and follow the arrows to ft2 We have to divide by 122!
2016 in2 122 = 2 016 12 12 = 14 ft2