Page 197 - TB_6B

Method 2 180 , 360 , 360 Divide by 2.
28
1 . a . a 110 b. b 120
c . c 70 d. x 40 3, 4, 5
e . y 75 f. z 85
At each step, the number is being added by a
Challenge P. 102~103 number one more than what the previous
number was added by.
23

PolygonQuadrilateralPentagonHexagon Activity 1 P. 106~107

Number of Line(s) Drawn 1 2 3

Number of Triangles 2 3 4 Dollar(s), x 1 234
Number of 4 8 12 16
n 2 triangles Gumballs, y

The number of triangles in a polygon multiplied 1. c. Height, x 1 2 3 4
by 180 is the sum of its interior angles.

1 . a . 1,080 b . 1,440 c . 1,800 Area, y 2 4 6 8

It is a function.

Unit 28. X and Y d . Natural 2 345
12 13 124 15
P. 104~105 Number, x
34 Factors, y
Fibonacci sequence can be found in daily life.
Piano keyboards 13 keys in total, 8 white keys It is not a function.
and 5 black keys, make an octave. There are more than one value of y for a
The black keys are in sets of 2s and 3s. They value of x.
complete the Fibonacci sequence of 2, 3, 5, 8,
and 13. Activity 2 P. 108~109
Petals if you count the number of petals in a
flower, you can see that almost all petals are 1 . b . Day(s),x 1 2 3 4
arranged in the sequence of 3, 5, 8, and 13.
15, 15 Hours, y 2 4 6 8
64, 64
Add 7. y 2x
37
Subtract 8. c . Length, x 2 4 6 8
22
Multiply by 3. Area, y 16 32 48 64
324
y 8x
186
d . Minute(s), x 2 4 6 8

Liters, y 10 20 30 40

y 5x