A decagon has 10 sides. If the polygon is symmetrical, the angle of rotation is given by the following equation:
360 / (number of sides)
Therefore,
360 = 10 = 36.
The interior angles are determined by the following equation:
180 - (angle of rotation)
Therefore,
180 - 36 = 144
The answer is A.
1 cup is 128 grams, she used 1/2 of a cup, 1/2 is 64 grams, she needs to add 1/4 of cup (32 grams) to have the correct amount
Think of how many there are. im not sure if you put these into ratios or not...
like for number 3 think of how many numbers 1-9 are multiples of three
1 2 3 4 5 6 7 8 9
and once you get that number you make it out of 9 because there were 9 numbers
Example
3:9 3/9
for questions one and two its out of 52 and if you don't know how many clubs and hearts are in a deck you can look it up and put it in a ratio with 52
Answer:
<h2>A = 16.5 square units</h2>
Step-by-step explanation:
It's the right triangle.
The formula of an area of a right triangle:

Look at the picture.
We have

Substitute:

3x3=9
9x3=27
With this, I assume the common ratio in this sequence to be the most recent number multiplied by 3