Hello!
So the 2 angles of the base are equal, so:
- If 74° = the angle of the vertex of the triangle:
(180 - 74)/2 = 53° one of the 2 angles
74°
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53° 53°
- If 74° one of the two angles of the base:
180 - 74*2 = 32°
32°
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74° 74°
So the others angles can be:
- 74° and 53°
- 74° and 32°