1. Thursday, February 9th Please complete warm-up Take out homework (Circle WKS) Find the Area each figure 1.2. 21 in 34 cm 5.6 in

2. Corny Joke of the Day a tribute to Tanner to week What do you call two banana peels A Pair of slippers

3. Homework Answers Can you find my mistakes?

4. Which Area formula matches the shape? 2. a=lw 5. a=s ² 4. a=bh 1. a=1/2 bh 3. a=πr ²

5. Flashcard Make one flashcards: 1.Area of a CIRCLE A=πr ²

6. Flashcard Practice Flashcard Practice

8. You can divide any parallelogram into two congruent triangles. So the area of each triangle is half the area of the parallelogram. Base Height Base

10. Whiteboard Review

11. Draw a RADIUS

12. A line segment with one endpoint at the center of the circle and the other endpoint on the circle is a radius (plural: radii). It is half the diameter Center Radius

13. Draw a diameter

14. A diameter is a line segment that passes through the center of the circle and has both endpoints on the circle. The length of the diameter is twice the length of the radius. Center Radius Diameter

15. Draw a circumference

16. The distance around a circle is called the circumference. Center Radius Diameter Circumference

17. What is Pi

18. The ratio of the circumference to the diameter,, is the same for any circle. This ratio is represented by the Greek letter , which is read “pi.” C d C d = 

19. What is the formula for circumference?

20. The formula for the circumference of a circle is C = d, or C = 2r. The decimal representation of pi starts with 3.14159265... and goes on forever without repeating. We estimate pi using 3

21. What is the formula for area of a circle

22. A=πr ²

23. What is the formula for a rectangle?

24. A=lw

25. What is the formula for a parallelogram

26. A=b x h

27. What is the formula for area of a triangle

28. A= ½ b x h

29. If a rectangle has a width of 10 in and a length of 7 in. What is the area?

30. 70 in ²

31. If a triangle has a height of 6 in. and a base of 4 in. What is the area?

32. 12 in ²

33. 5 Alive

34. 1-4 Find the Area 1. 2. 3. 5.6 cm 2 cm 32 mm 3 ½ ft 6 ft 4. 5. 13.5 cups=______pints 32 in

35. Find the area of the polygon Think: Break the polygon apart into rectangles. Find the area of each rectangle. 1.7 cm 4.9 cm 1.3 cm 2.1 cm

36. A = lw A = 4.9 1.7 A = 2.1 1.3 Write the formula for the area of a rectangle. A = 8.33 A = 2.73 8.33 + 2.73 = 11.06Add to find the total area. The area of the polygon is 11.06 cm 2. 1.7 cm 4.9 cm 1.3 cm 2.1 cm

37. Find the area of the polygon Think: Break the polygon apart into rectangles. Find the area of each rectangle 1.9 cm 5.5 cm 1.5 cm 2 cm 1.9 cm 1.5 cm 2 cm 3.4 cm 5.5 cm

38. A = lw A = 5.5 1.9 A = 2 1.5 Write the formula for the area of a rectangle. A = 10.45 A = 3 10.45 + 3 = 13.45Add to find the total area. The area of the polygon is 13.45 cm 2 1.9 cm 5.5 cm 1.5 cm 2 cm

40. Think: Break the figure apart into a rectangle and a triangle. Find the area of each polygon. 36 ft 22 ft 20 ft 22 ft 16 ft

41. A = lw A = 22 20 A = 440 A = 176 440 + 176 = 616 Add to find the total area of the polygon. The area of the polygon is 616 ft 2. A = bh 1 2 __ A = 22 16 1 2 __ 20 ft 22 ft 16 ft

43. Interior Designers and architects use composite figures everyday! Look at the floor plan, do you see different shapes inside?

44. Composite Project Task #1 Answer questions 1-3 using the floor plan I gave you Task #2 On a SEPARATE SHEET OF PAPER create your own floor plan! Your floor plan must create and find the AREA of at least 4 rooms, 1 square room, 1 rectangle room, and 1 triangle room! Due Friday at the end of the day!