A hexagon ABCDEF is shown.

Mathematics

1 answer:

Bas_tet [7]3 years ago

7 0

Answer:

140

Step-by-step explanation:

115+165+140+90=510

180*4=720 (sum of interior angles of hexagon)

115+165+140+90+x+2x=720

why 2x because i kept ANGLE DEF as x and ANGLE CDE is twice so 2x

510+2x+x=720

3x=210

x=210/3

x=70

ANGLE DEF IS 70

so because ANGLE CDE IS TWICE ANGLE DEF thus 70*2=140

ANGLE CDE =140

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