Review12.1-12.6

Review for 12.1-6
#1
Describe: line ray segment
angle : obtuse, right, acute, straight
triangle: obtuse, right, acute, scalene,
isosceles, equilateral
2/19/2015
1
Identify the angles by pointing to each:
2
2
2
2
2
2
pair
pair
pair
pair
pair
pair
#2
corresponding angles
supplementary
alternate interior
alternate exterior
vertical
adjacent
2/19/2015
2
If ∠1 = 60°, find
m∠2 = _________
m∠7 = _________
m∠3 = _________
m∠9 = _________
m∠16 = _________
m∠15 = _________
m∠10 = _________
Be prepared to prove your answers.
2/19/2015
#3
1
2
8
7
9
10
16 15
3
6
11
14
4
5
12
13
3
#4
Count from 3 to 14, naming the polygons by the
number of sides of each.
Find the missing angle measure if ∠A = 110° and
∠B =40°:
A
B
2/19/2015
4
Write the formula for finding the sum of angle
measures in a polygon _____________________
#5
Find the sum of angle measures of:
Square _______________________
Octagon ______________________
Heptagon _____________________
Nonagon ______________________
What is the measure of EACH angle in a regular heptagon?
_________________
2/19/2015
5
Write both formulas for circumference:
________________ _________________
#6
Put work in first blank.
Find C if d = 25 m. __________________= _________
Find C if r = 3.5 in. __________________ = _________
**Find d if C = 9.42 cm. _________________ = _______
**Find r if C = 4.8 ft. ___________________ = ________
2/19/2015
6
Find the perimeter:
#7
10 ft.
4
8
2/19/2015
7
Label the formulas to find the sides of the right #8
triangles:
45°-45° rt. triangle
30°-60° rt. triangle
2/19/2015
8
Find the missing sides of the 45°-45° rt. triangles:
x= ________
x
y
y = ________
#9
3
10√2
x
x= ________
y = ________
y
2/19/2015
9
#10
15
x
y
x= ________
y = ________
2/19/2015
x
y
8
x= ________
y = ________
10