this post was submitted on 08 Oct 2024
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[–] [email protected] 0 points 5 months ago

Heheheh the 2 triangles are having segs

[–] [email protected] 11 points 5 months ago (1 children)

The answer is 125 degrees but the triangle on the left has 190 degrees in it

[–] [email protected] 5 points 5 months ago* (last edited 5 months ago) (1 children)

Nah, the angle isn’t specified as a right angle. We can’t assume it’s 90° just because it’s drawn that way, because it isn’t drawn to scale.

Left triangle has 180° total. 60+40=100, which means that middle line is actually 80°, not 90. And since the opposite side is the inverse, we know it is 100° on the other side.

100+35=135. We know the right triangle also has 180° total, so to find the top corner we do 180-135=45. So that top corner of the right triangle is 45°, meaning x must be 135° on the opposite side.

[–] [email protected] 0 points 5 months ago

I mean, it's visibly an acute angle wether it's labelled as such or not.

[–] [email protected] 2 points 5 months ago

The angle formerly known as twitter

[–] [email protected] 10 points 5 months ago (1 children)

Either this is drawn wrong or they broke geometry

[–] [email protected] 2 points 5 months ago* (last edited 5 months ago)

The triangles aren’t drawn to scale. The middle line isn’t a 90° angle, because it isn’t specifically marked with a square angle in the corner. Triangles always add up to 180°, so the angle in the left triangle is actually 80°, not 90°.

[–] [email protected] 3 points 5 months ago

That was a good one

[–] [email protected] 2 points 5 months ago (2 children)
[–] [email protected] 23 points 5 months ago (2 children)

135, that's not a 90 degree angle in the problem. Just visually.

[–] [email protected] 1 points 5 months ago

You are right that is 80° so the value of x will be 135°

[–] [email protected] 7 points 5 months ago

Oh that's just a cheap trick. You are right, it's 80 degrees despite looking like 90 degrees.

[–] [email protected] 8 points 5 months ago* (last edited 5 months ago) (1 children)

Nah, the imagery tricks you. 180 degrees to a line. 180 degrees inside a triangle.

So you can gather the inside unlabeled angle on the triangle on the left is only 80 degrees: (180-[60+40])

So you then know it's 100 on the right side of that +35 leaves you with 45 degrees left for the top of the right one.

180-45=. 135 degrees

[–] [email protected] 6 points 5 months ago

Also if you add up all visible angles you get 135, so I'm sold on that alone. No no no, I won't hear any rebuttals.

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