D Answers

- DAM
- 1) 40 hm= 400 dam=4000 m

- DECA-
- 1) 1 decacards

- DECAGON
- 1) 7
- 2) 35
- 3)

- DECI-
- 1) 40 decibel

- DECIMAL
- 1) 5.5
- 2) to the right of 25, ie. 25.

- DEDUCTION
- 1) $115.90
- 2) $269.23

- DEGREE
- 1)
- 2)

- DENOMINATOR
- 1) 4, 3, 9, 15
- 2) 3/2 & 1/2

- DEPENDENT
- 1) b and c

- DETERMINE
- 1) 2

- DIAGONAL
polygon sides diagonals from 1 vertex diagonals triangle 3 0 0 quadrilateral 4 1 2 pentagon 5 2 5 hexagon 6 3 9 heptagon 7 4 14 octagon 8 5 20 - Do you see any patterns here? Describe the patterns in words or symbols. Ans. The number of diagonals from 1 vertex is three less than the number of sides: d = s - 3. The total number of diagonals is 1 + 2 + 3 + 4 + ... + (s - 3) + (s - 3). List the number of new diagonals from each vertex to verify this. This sum is the total number of diagonals. This sum is because this equals s - 3 more than the sum of the first s - 3 counting numbers.

- 1) 8 cm
- 2)

- DIGIT
- 1) 2, 13, 24, 35, 46, 57, 68, 79
- 2) 1
- 3) 0

- DIMENSION
- 1) 4"
- 2) 8 cm

- DIMINISH
- 1) 5

- DISCRIMINANT
- 1) -8
- 2) 2 real roots, because the discriminant is +29

- DISTANCE
- 1) 200 miles
- 2) or about 10.198

- DIVISIBILITY TEST
- 1) Is the sum of the digits of a number divisible by 3? If so, the number is divisible by 3.

- DIVISIBLE
- 1) no, yes, no
- 2) 210, or 420, or 630, or ...

- DODECAGON
- 1) 11 cm

- DOUBLE
- 1) 6x

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