Answer:
x = 24
Step-by-step explanation:
The formula for determining the sum of interior angles is:


Therefore to determine an equation for x, we must add up all the interior angle equations and set them equal to 720.

The equation and answer above shows how to find x, which equals 24.
Since 18 is one twentieth of the angle of a full circle, 360, the circumference is 20 times the arc distance of 15, or 300
Answer:
it should be 67/65 or if in mixed number form : 1 2/65
They are similar because they both are triangles. But they are not the same size.
3.
a. 380 ÷ 38 = 10
b. 190 ÷ 38 = 5
c. 570 ÷ 38 = 15
d. use 10 times 38 = 380, 190 is half of 380 so half of 10 is 5, 570 is 380 + 190 so 10 + 5
4.
a. 670 ÷ 67 = 10
b. 603 ÷ 67 = 9
c. 737 ÷ 67 = 11
d. use 10 times 67 = 670, 603 is 670 - 67 so 10 - 1 = 9, 737 is 670 + 67 so 10 + 1 = 11
Challenge:
1062 - 279 = 783

783 - 261 = 522
522 ÷ 15 = 34 remainder 12
So she put 34 books in each box