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Mathematics 9 Online
OpenStudy (anonymous):

help please

OpenStudy (anonymous):

OpenStudy (anonymous):

\[A(ABCDE) = A(\Delta AEB) + A(\Delta BED)+ A(\Delta CBD)\] \[A(ABCDE) = \frac {1}{2} \times 20 \times 4 + \frac {1}{2} \times 6 \times 17+ \frac {1}{2} \times 20 \times 4\] \[A(ABCDE) = 10 \times 4 +3 \times 17+ 10 \times 4 =40+51+40 = 141 sq -units\] @123qweasdzxc

OpenStudy (anonymous):

@123qweasdzxc

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