Interior and Exterior Triangle Angles

∠ WXY = 20°

Step-by-step explanation:

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

∠ XYZ is an exterior angle of the triangle, thus

10x - 5 = 3x + 17 + 3x + 2

10x - 5 = 6x + 19 ( subtract 6x from both sides )

4x - 5 = 19 ( add 5 to both sides )

4x = 24 ( divide both sides by 4 )

x = 6

Thus

∠ WXY = 3x + 2 = 3(6) + 2 = 18 + 2 = 20°

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

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take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.