megan3226
23.07.2020 •
Mathematics
Can you help me to find the values of abc and cde ?
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Ответ:
88° and 132°
Step-by-step explanation:
The sum of angles in a pentagon ( a 5-sided shape) is given as
= (5 - 2) 180°
= 540°
The angles ∠EAB and ∠AED are supplementary hence the sum is 180° Therefore,
∠AED + 110 = 180
∠AED = 180 - 110
= 70°
Given that the sum of the angles in a pentagon is 540° then
110 + 70 + 2k + 140 + 3k = 540
5k + 320 = 540
5k = 540 - 320
5k = 220
k = 220/5
= 44°
Hence the angle ∠ABC
= 2 × 44
= 88°
∠CDE
= 3 × 44
= 132°
Ответ:
In order: -2.6, -2.5, -2.1, -1.9, -1.1, -0.75, -0.5, -0.25, 0.5, 0.9, 2.7
Step-by-step explanation: