A<u> triangle</u> is a <em>plane shape</em> bounded by three straight sides, thus it has three internal <em>angles</em>. Therefore, the required <em>values</em> are:
i. x =
ii. y =
A <em>plane shape</em> is a figure bounded by<u> straight</u> sides. Examples are triangles, squares, rectangles, rhombus, kite, trapezium, etc. A triangle is an example of a plane shape that has three<em> sides</em>, thus three <u>angles.</u> also, the sum of <em>angles</em> in a given triangle is .
Thus the required values of x and y can be determined as follows:
x + 20 + 120 =
x + 140 =
x = - 140
So that,
x =
Thus,
y = 20 + 120 (the sum of<em> opposite</em> angles is <em>equal</em> to an exterior angle.)
=
Therefore, x = and y =
For more clafifications on sum of angles in a traingle, visit: brainly.com/question/21680544
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