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Q: A triangle has one angle of 80 degress and another of 60 degrees how many degrees must there be in the third triangle?

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anything over 180, A triangle is composed of 180 degrees, so if one angle alone is 180 degress then the shape is not A triangle.

90 degress :P

The sum of the measures of the angles of a triangle is 180 degrees. First, calculate the sum of the two known angles. Then subtract that result from 180. That difference is the measure of the third unknown angle. Given: One angle of a triangle is 15 degrees and the second angle of the triangle is 85 degrees. To find: We need to find the third angle of the triangle. Let the third angle of the triangle be x. We know that the sum of the angles in a triangle is 180 degrees. ==> 15 degrees + 85 degrees + x degrees = 180 degrees. ==> 100 degrees + x degrees = 180 degress. ==> x = 180 degrees - 100 degrees. ==> x = 80 degress. Therefore the third angle of the triangle is 80 degrees.

No it can't. The reason is because an obtuse angle/triangle has to have a measurement of 90 degrees more or up until 180 degress.

A right triangle.

A scalene triangle

40 degrees

An angle of 200 degrees is a reflex angle

since it is a right triangle there is one 90 degree angle and another of the angles is 45 degrees. there is 180 degrees in a triangle so the missing angle is 45 degrees.

77 degrees

A right triangle is a triangle in which one angle is equal to 90 degrees and the remaing two angles are acute(ie., less than 90 degree). so this triangle is a right angle triangle.

40 degrees

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