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Question Number 196225 by mr W last updated on 20/Aug/23

Commented by mr W last updated on 20/Aug/23

find the area of red part in the  parallelogram.

findtheareaofredpartintheparallelogram.

Answered by liuxinnan last updated on 20/Aug/23

s_1 +s_2 +s_5 +s_6 =(1/2)S  s_2 +s_3 +s_4 +s_6 +s_7 =(1/2)S  s_7 =79+10−8−72=9

s1+s2+s5+s6=12Ss2+s3+s4+s6+s7=12Ss7=79+10872=9

Commented by liuxinnan last updated on 20/Aug/23

Commented by mr W last updated on 20/Aug/23

great!

great!

Answered by mr W last updated on 20/Aug/23

Commented by mr W last updated on 20/Aug/23

10+E+79+F=((parallelogram)/2)  8+E+72+F+red=((parallelogram)/2)  ⇒8+E+72+F+red=10+E+79+F  ⇒red=10+79−8−72=9 ✓

10+E+79+F=parallelogram28+E+72+F+red=parallelogram28+E+72+F+red=10+E+79+Fred=10+79872=9

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