Quiz 101-10.4 Extra Credit Answer Key to p.534 #1-11
1. x + 156 = 180
2. 219/3
3. yes; octagon; concave
x
= 24; obtuse
= 73 ft
4. yes; pentagon; concave 5. No; it has a curved side
6. A = (16)(6)
7. A = 1/2(10 + 40)35
8. A = 1/2(7 + 20)9
= 90 cm2
= 1/2(50)35
= 1/2(27)9
= 25(35)
= 13.5(9)
= 875 in2
= 122 ft2
9. A = 3.14(10.5)2
10. A = 10(8)
11. A = 3.14(3)2
= 347 m2
= 80 mm2
= 28 in2