Respuesta :

akaleti47
16 and 17. area is given. A=[tex] \pi r^{2} [/tex] use this relation to find radius

18.base=2, h=3.8 so, area=(1/2)*base*h=3.8 thats option D

19. area= base*h=12*7=84 option B

20.area of trapezoid= (1/2)h(a+b) where a and b are parallel sides.
so, area=(1/2)(3)(8.9+3.3)=(1/2)(3)(12.2)=3*6.1=18.3 option D

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