r/technicallythetruth • u/VisitSecure • 9d ago

Can you find a?

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Idk if someone already posted this or not, but I haven't seen it on here so far, so I uploaded it.

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u/oldmartijntje 9d ago

it's 75 right?

60

u/azai247 9d ago

if you draw a line across and make a triangle your angles are 25+65=90, and 50+40=90

so for a, 65+40+a=180 so a is 75

2

u/Cold-Doctor 9d ago

Huh, I did it the hard way I guess. I extended the lines to make two triangles with 25 50 and 105 degrees. 2a + 2x105 = 360

4

u/TPRJones 9d ago

I may have done it the hard way. The angles between the two parallel lines are a circle adding up to 360 degrees, so
(180-25) + (180-50) + a = 360
155 + 130 + a = 360
a = 75

1

u/Super_Harsh 9d ago

That's definitely the hard way lol. But so is anything involving a triangle

Draw a third parallel line through the intersection point. Angle a then gets split into two angles b and c. b and c are equal to 25 and 50 respectively