Download 8Team practice 2 KEY

Geometry
Chapter 8 Team Practice
Name _________________________
1. Consider the pentagon with line of symmetry.
a. Find the sum of the angles of the pentagon 540o
b. Find the value of x.
4x
x
c. Find the value of each angle.
Top=304o, right & left = 38o
bottom 2 = 80o
38
80°
2. Draw a regular hexagon with perimeter 42 feet.
a. Find the sum of the exterior angles.
b. What is the measure of each exterior angle?
360o
60o
c. What is the sum of the interior angles?
d. What is the measure of each interior angle?
720o
120o
e. What is the measure of each side?
7 ft
3. The perimeter of a regular polygon is 120 feet. An exterior angle of the polygon measures 24°.
a. Find the sum of the exterior angles.
360o
b. How many sides does this polygon have?
n = 15
c. What is the measure of each exterior angle?
24o
d. What is the measure of each interior angle?
156o
e. What is the sum of the interior angles?
f. What is the measure of each side?
8 ft
2340o
 2  5 3  2 
,


2 
6. Find the midpoint of segment AB given A(2,-3) and B(-5 2)  2
   32 ,  12 
7. Find the perimeter and area of a right triangle with legs = 10 & 24. Draw and label first.
A  12 (24)(10)
 120un2
P  10  24  26
 60un
4. Find x. Then find the value of each angle.
Find the area of circle, sector, circumference & arc.
2
2
127  88  (5 x  3)  (10 x  7)  360 Ac   (12)  452.89un
41
15 x  360  225
Asec tor  452.89  360
  51.52un2
x9
Cc   (24)  75.40un
o
o
41
97 & 48
Carc  75.40  360
  8.59un
5. A regular polygon has an interior angle of 135.
 How many sides does it have? 8 sides
 What is the name of this polygon? octagon
 What is the sum of the interior angles? 1080o
8. Given the rectangles at the below,
 What is the scale factor? (similarity ratio of the sides) SF  96 
 What is the ratio of the perimeters? SF  96  23
2
3

What is the ratio of the areas? ratio of areas   23  

What is the ratio of the volumes? ratio of volumes   23  

If the area of the large rectangle is 100 cm2, find the area of the smaller rectangle. Use a proportion
x
4
9  100
to solve this problem.
44.4  44 94 un2
2
4
9
3
8
27
1. 105  118  75  130  x  540
x  112o
2. 130  132  130  130  138  138  x  900
x  102o
3.105  1080  72  x  360
x  75o
9.