miachr4897 miachr4897

27-03-2021
Mathematics

contestada

this is my last question please help me

this is my last question please help me class=

Respuesta :

Adetunmbiadekunle Adetunmbiadekunle

01-04-2021

Answer:

Angle ADC = 80 degrees

Step-by-step explanation:

Here, we want to find the measure of angle ADC

mathematically, sum of angles at a point is 360

Thus;

x + 3x + x + 10 = 360

5x + 10 = 360

5x = 360-10

5x = 350

x = 350/5

x = 70

From the diagram;

angle ADC is (x + 10)

so we have; (70 + 10) = 80 degrees

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