because 30 and 60 makes 90
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An isosceles triangle has angles of 75, 75 and 30 degrees.
If one of its exterior angles is 30 degrees, then it is a star with 6 points and 12 sides. 360 degrees / 30 degrees = 12 angles It is a regular dodecahedron.
Total sum of angles in a triangle is equal to 180 degrees . Right triangle has a 90 deg. angle so 180-90= 90-30 = 60. The three angles are 90 60 and 30 degrees. == ==
each of the twelve angles will be 30 degrees? each of the twelve angles will be 30 degrees?
The angles could be 105 degrees and 75 degrees because they both add up to 180 degrees