1. Chapter 11 11.1, Day 1 Pg. 767 #1-4, 8, 10-11, 17-25 odd, 42, 46-52
Worksheet
11.2
Quiz
Start 11.4 notes
11.4, Day 1
11.4, Day 2
11.4, Day 3
11.3
Pg. 789 #9-29 odd, 33, 42-43
11.3 Shaded Regions
Review
Chapter 11 Test 

2. Chapter 11 Learning Targets!
Geometry
Chapter 11 Learning Targets!
By the end of the chapter, you should be able to:
Find perimeters and areas of parallelograms
Find perimeters and areas of triangles
Find areas of trapezoids
Find areas of rhombi and kites
Find areas of circles
Find areas of sectors of circles
Find areas of segments of circles
Find areas of regular polygons
Find areas of composite figures
Check off each item as you master the material, to make sure you are ready for the test!

3. Section 11.1 ~ day 1 Areas of Parallelograms and Triangles!
L.T.#1: Be able to find the areas of parallelograms (including rhombuses, rectangles, & squares)!
L.T.#2: Be able to find the areas of triangles!
Quick Review:
In a triangle, an altitude goes from a _______ and is ____________ to the opposite side.
Quick Vocab:
In a parallelogram, an altitude does the same thing! This is also called the _______.

4. Area of any Parallelogram:
Note: The base can be any side—you choose! But, the height depends on which side you pick to be the base.
Key: The base and height are always _____perpendicular_______ to each other.

5. Find the area AND perimeter of each parallelogram
Find the area AND perimeter of each parallelogram. Don’t forget your units!
4.5 in.
5 in.
4 in.
6 ft
8 m
3 m
3 cm
4 cm
x cm 60

6. Find the area AND perimeter of the parallelogram with the given vertices!
Q (4, 2)
R (6, 5)
S (3, 5)
J (-3, -3)
K (0, 4)
L (5, 4)
M (2, -3)

7. Just in case you were getting bored…
Find the height of the parallelogram!
15 cm
1.5 m
A = 600 cm2
13 in.
12 in.
10 in. x
Find the value of x.

8. Section 11.1 ~ day 2 Areas of Parallelograms and Triangles!
L.T.#1: Be able to find the areas of parallelograms (including rhombuses, rectangles, & squares)!
L.T.#2: Be able to find the areas of triangles!
Quick Review: Find the area.
4 cm
5 cm
2 cm

9. Note:
Every triangle is ________ of a parallelogram!

10. Again, base and height must be _______________ to each other!
Therefore…!
Again, base and height must be _______________ to each other!
Find each area. Don’t forget your units!
5 cm
6 cm
6.4 ft
4 ft
10 ft
31 m
30 m
13 m

11. Let’s practice some more!
Find the area of the triangle with the given vertices!
What are the lengths of the legs of an isosceles right triangle with area of 50 in.2?
P (-5, 2)
Q (2, 2)
R (4, -2)

12. Putting it all together . . .
The base of the house has a length of 50 ft. The height of the house is 12 ft, and the height of the roof is 4 ft. What is the area of the house?

13. L.T.#2: Be able to find the areas of triangles!
Did we meet the target?
L.T.#1: Be able to find the areas of parallelograms (including rhombuses, rectangles, & squares)!
L.T.#2: Be able to find the areas of triangles!
Prove It!
Find the area of the figure below!
12 m
30 m
20 m
Asnmt: Day 2

14. Section 11.2 ~ Areas of Trapezoids, Rhombuses, and Kites!!
L.T.#1: Be able to find areas of trapezoids!
L.T.#2: Be able to find areas of rhombuses and kites!
Quick Review: Find the value of each variable! y
45° x y 12 x
30°

15. Recall: The height of a trapezoid is the ______________ distance between the bases.
Area of a Trapezoid:
Leg
Base1
Base2
Height
10 in.
7 in.
4 in.
Find each area. Don’t forget your units!
12 m
20 m
10 m

16. Find the area of each trapezoid!
6 m
12 m
60°
4 ft
45°

17. Are trapezoids in the real world?
The border of Arkansas resembles a trapezoid with bases 190 mi and 250 mi, and height mi. Approximate the area of Arkansas.
The border of car window resembles a trapezoid with bases 20 in. and 36 in., and height 18 in. Approximate the area of the window.

18. Area of a Kite or Rhombus:
Recall:
Kite: 2 pairs __________ sides , 0 pairs ___________ sides ||
Rhombus: ______ sides 
Area of a Kite or Rhombus: d2 d1 d2 d1
Find each area. A B C D 2 3 5 W X Y Z 5 12

19. Find the area of each kite or rhombus!15 12
45° 10

20. Review: Find the value of each variable!x
45° y x y 8 y x
60° y 12 x
30°

21. Section 11.4 ~ day 1 Areas of Regular Polygons!!
L.T.: Be able to find measures of angles in polygons!
Quick Review:
What is a “regular” polygon?
New Vocab:
______:
________:
center of the circle circumscribed about the regular polygon
distance from the center to a vertex
perpendicular distance from the center to a side

22. Finding Angle Measures!
Find the measure of each numbered angle. 1 3 1 4 2 2 3
What would be the measure of each central angle in a nonagon?
In a 12-gon? In a 36-gon?

23. Finding Angle Measures!
Find the measure of each numbered angle. 1 1 2 2 3 3

24. Did we meet the target? Prove It!
L.T.: Be able to find measures of angles in polygons!
Prove It! 1 3 2
On your TICKET OUT, write the measure of each numbered angle!

25. Review: Find the value of each variable!y 12 x
30° x
45° y 1 2 3 4 1 2 3

26. Section 11.4 ~ day 2 Areas of Regular Polygons!!
L.T.: Be able to find the areas of regular polygons!
6 m
Area of any Regular Polygon:

27. Find the area of each regular polygon. Don’t forget your units!
Find the area of a regular heptagon with side length 5 cm and apothem 8 cm.

28. Find the area of each regular polygon. Don’t forget your units!
Find the area of a regular nonagon with side length 4.7 in. and apothem 6.5 in.

29. L.T.: Be able to find the areas of regular polygons!
Did we meet the target?
L.T.: Be able to find the areas of regular polygons!
Prove It!
Find the area of a regular hexagon with side length 8 cm and apothem cm.

30. Find the value of each variable!
Warm-up: x
45° 5 x 12 y
30°
Find the measures of each angle!
Find the area! 1 2 3

31. Section 11.4 ~ day 3 Areas of Regular Polygons!!
L.T.: Be able to find the areas of regular polygons using special right triangles!
The next step:
Find the measure of each central angle, and then find the area of the regular hexagon!

32. Find the area of each regular polygon!

33. Find the area of each regular polygon!

34. Thinking outside the box . . .
A regular hexagon has perimeter 120 m. Find its area.

35. Un-bee-lievable!
Did you know that when bees make honeycomb, each cell is a regular hexagon? Since we are craving some sweet honey, we break off the piece of honeycomb below. But before we extract the honey, we think it would be pretty SWEET to calculate the total area of our honeycomb. We measure that the radius of each cell is 1 cm.

36. Section 11.3 ~ Areas of Circles and Sectors!!
L.T.: Be able to find the area of circles, sectors, and segments of circles!!
Quick Review: Z L M N O
Name the following from circle Z.
Minor arc:
Major arc:
Semicircle:
Radius:
Diameter:

37. Area of a Circle! More Vocab:
Find the area of each circle. Leave answers in terms of π.
14 in.
10 in.
12 in.
More Vocab:
________ of a circle:
_________ of a circle: A O B
region bounded by an arc and the two radii touching its endpoints
region bounded by an arc and the segment joining its endpoints

38. Finding AREA of a sector!
Find the area of each sector. Leave answers in terms of π.
Sector CZD
Sector BZC
Sector BZA Z A D C B
72°
20 cm

39. Finding AREA of a segment!
Find the area of the sector.
Find the area of the triangle.
Subtract.
Find the area of each shaded region. Leave answers in terms of π.
10 in.
24 ft
120°

40. More Areas!
Find the area of the circle, sector BZD, and the shaded segment. Leave answers in terms of π. A Z
6 m B D
90°

41. Challenge Problems!
Find the area of each shaded region. Leave answers in terms of π.
10 in.
15 cm

42. Did we meet the target? Prove It!
L.T.: Be able to find the area of circles, sectors, and segments of circles!!
Prove It!
Get started on the HW!