The problem asks to find the size of angle $k$ in the triangle. We are given an exterior angle of $244^\circ$, and two interior angles of the smaller triangles formed by the lines extending from the vertices where angle $k$ sits; these are $29^\circ$ and $35^\circ$.

GeometryTrianglesAnglesExterior AnglesInterior AnglesAngle Sum Property
2025/6/3

1. Problem Description

The problem asks to find the size of angle kk in the triangle. We are given an exterior angle of 244244^\circ, and two interior angles of the smaller triangles formed by the lines extending from the vertices where angle kk sits; these are 2929^\circ and 3535^\circ.

2. Solution Steps

First, find the two interior angles adjacent to the exterior angle of 244244^\circ.
Since the sum of angles on a straight line is 180180^\circ, these two angles can be found by subtracting 2929^\circ and 3535^\circ from 180180^\circ respectively. However, since we know the exterior angle we calculate the adjacent interior angle by 360244=116360 - 244 = 116.
The sum of angles around a point is 360360^\circ. The interior angle adjacent to 244244^\circ is 360244=116360^\circ - 244^\circ = 116^\circ.
Then, calculate the remaining interior angles of the main triangle by finding the supplementary angles to 2929^\circ and 3535^\circ.
Supplementary angle to 29=18029=15129^\circ = 180^\circ - 29^\circ = 151^\circ. But since we know the supplementary angle to the exterior angle that forms with the 244244^\circ we proceed.
Let the two remaining angles in the triangle be aa and bb.
a=18029=151a = 180^\circ - 29^\circ = 151^\circ, we want the other angle.
b=18035=145b = 180^\circ - 35^\circ = 145^\circ, we want the other angle.
So instead use the 180(180a)=a=29180 - (180-a)= a = 29, b=35b = 35 to construct small angles from 180a180- a and 180b180 - b
Let the two angles be x=180ax = 180-a and y=180by=180-b.
We know that a+b+116=180a+b+116=180. Then a+b=180116=64a+b=180 - 116= 64.
We know that the sum of angles in a triangle is 180180^\circ.
k+(18029)+(18035)=180k + (180^\circ - 29^\circ) + (180^\circ - 35^\circ) = 180 doesn't work.
Let's try another approach. The adjacent angles of 2929 and 3535 are aa and bb such that the given exterior angle is 244244.
The angle at the bottom is therefore 360244=116360 - 244= 116. Therefore the sum of the other two angles is
180116=64180-116 = 64.
Let's find the angles in the two smaller triangles near the bottom vertices.
The small angles are 18011629=35180-116-29 = 35 and 18011635=29180 - 116 - 35 = 29. We know therefore that kk is an exterior angle that can be found from 29+35=6429+35 = 64
However, if the two smaller angles were inside the main triangle, 2929 and 3535, k+29+35=180k+29+35 =180 becomes a problem.
The two inside angles are not formed by small triangles, therefore the angle we have been given is 360244=116360-244 = 116.
Thus we now only need the angles of 29+35=18064=11629+35 =180-64 =116.
Final angles are now 6464.
Since the sum of angles in a triangle is 180180^\circ, we have k+29+35=180k+29+35 =180 so 18064=116180 - 64=116. This can't be either since this can't be $244 =29+35+2(90)=
2
3
4.
Looking closely we realize that the 2929 and 3535 do not make up the inside angles, but the exterior angles to them. So A=18029=151A=180-29=151, and the other exterior angle = 18035=145180-35=145. So k+151+145=180=k+296k +151 + 145=180=k+296. This does not add up therefore
Let us draw a diagram and see where that gets us

3. Final Answer

64

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