Geometry help?

0 ⤊

Fill in the missing information for the following trapezoids:
height = 28.9 m
b1 = 26.9 m
b2 = ________
area = 806.31 m^2

A 17.06 sq m
B 15 m
C 46 m
D 23 m
E 28.9 m
F 51 m

2007-10-18 05:41:15 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

3 answers

e

(26.9+b2)/2 * 28.9=806.31
26.9+b2=806.31/28.9*2=55.8
b2=28.9

2007-10-18 05:46:29 · answer #1 · answered by Kenneth H 3 · 0⤊ 0⤋

A = (b1 + b2)h/2

806.31 = (26.9 + b2)(28.9)/2

1612.62 = 777.41 + 28.9b2

835.21 = 28.9b2

28.9 = b2

2007-10-18 12:50:31 · answer #2 · answered by kindricko 7 · 0⤊ 0⤋

b2 = 2A/h - b1
... = 2 * 806.31/28.9 - 26.9
...= 28.9

2007-10-18 12:47:03 · answer #3 · answered by gebobs 6 · 0⤊ 0⤋