Question

MORE HELP :( acellus work

Answer 1

A triangle is a plane shape bounded by three straight sides, thus it has three internal angles. Therefore, the required values are:

i. x = $40^{o}$

ii. y = $120^{o}$

A plane shape is a figure bounded by straight sides. Examples are triangles, squares, rectangles, rhombus, kite, trapezium, etc. A triangle is an example of a plane shape that has three sides, thus three angles. also, the sum of angles in a given triangle is $180^{o}$.

Thus the required values of x and y can be determined as follows:

x + 20 + 120 =  $180^{o}$

x + 140 =  $180^{o}$

x =  $180^{o}$ - 140

So that,

x = $40^{o}$

Thus,

y = 20 + 120 (the sum of opposite angles is equal to an exterior angle.)

            = $120^{o}$

Therefore, x = $40^{o}$ and y = $120^{o}$

For more clafifications on sum of angles in a traingle, visit: brainly.com/question/21680544

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