9.1 Review Worksheet (continued)
9. the area of a kite in which d 1 = (6 x + 5) ft and d 2 = (4 x + 8) ft
E
A
B
In origami, a square base is the starting point for the creation of many figures, such as a crane. In the pattern for the square base, ABCD is a square, and E, F, G, and H are the midpoints of the sides. If AB = 6 in., find the area of each shape. 10. rectangle ABFH 11. △ AEJ
H
F
J
D
C
G
12. trapezoid ABFJ
9.1.2 Developing Formulas for Circles and Regular Polygons Find each measurement. Give your answers in terms of π . 13. the area of M 14. the circumference of Z
7 yd
Z
M
5 m
15. the diameter of G in which C = 10 ft.
16. A horse trainer uses circular pens that are 35 ft, 50 ft, and 66 ft in diameter. Find the area of each pen. Round to the nearest tenth.
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