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If you mean "Does the sum of two angles equal exactly 90 degrees?" it is yes.

Q: When the sum of two angles equal exactly 90 degrees?

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The sum of the exterior angles of a polygon is equal to 360 degrees.

"The sum of the angles in a triangle equal 180 degrees" is a true statement.

The sum of the 3 angles of a triangle will ALWAYS equal 180 degrees.

360 degrees.

180 degrees

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The sum of the exterior angles of a polygon is equal to 360 degrees.

Supplementary means the sum of two angles equal to 180 degrees. The Sum of 90 degrees would be complimentary, where the sum of two angles equal to 90 degrees.

"The sum of the angles in a triangle equal 180 degrees" is a true statement.

the sum of the angles of a trapizoid equal 360 degrees.

No. Only the sum of the measures of the angles of a triangle equal to 180 degrees; in the case of a quadrilateral it amounts to 360 degrees.

The sum of the 3 angles of a triangle will ALWAYS equal 180 degrees.

360 degrees.

180 degrees

No. The sum of the angles in ALL triangles is equal to 180 degrees. No triangle's angles equal 360.

They are complementary angles

The sum of the interior angles of a quadrilateral are 360 degrees

Yes the sum of the three angles in a triangle add up to 180 degrees.