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Using indirect reasoning to show that a triangle cannot have two right angles?
Triangles total 180 degrees. Triangles have three angles. Two angles of 90 degrees total 180 degrees.
In the two triangles below all angles equal 60 degrees Are the two triangles congruent?
not enough information
In the two triangles all angles equal 60 degrees and AB equals EF Are the two triangles congruent?
Yes
Are all isosceles triangles with two 50 degrees angles congruent?
gyghio
Why is the sum of the interior angles of a quadrilateral 360 degrees?
This result follows from the theorem that the sum of the angles of a triangle is 180 degrees. Drawing a diagonal in the quadrilateral splits it into two triangles and the angles of the triangles together combine to form the angles of the quadrilateral.
Can a triangle have two angles?
No, a triangle cannot have two angles. Triangles always have three sides and three angles that add up to 180 degrees.
How do the angles inside a quadrilateral add up to 360?
If you cut any quadrilateral along one of its diagonals, the figures formed are two triangles. Since the sum of the angles of a triangle is 180 degrees, then the sum of the angles of two triangles is 2(180) = 360 degrees. For this reason, the sum of the angles of a quadrilateral is 360 degrees.
What is the name of a triangle with 2 equal angles?
An Isosceles triangles has two equal angles :)
What is the sum of the angles in a four sided shape?
The sum of the angles of a four sided shape is equal to 360 degrees. One way to prove this is to draw a diagonal line connecting two opposite vertices, resulting in two triangles. Since the sum of the angles of a triangle equal 180 degrees, and there are two resulting triangles, then the sum of the angles of two triangles (180 + 180) will equal 360 degrees. Frank frank253@hotmail.com
What angles are supplementary angles?
Supplementary angles are angles that have a combined sum of 180 degrees. Usually its two angles. But I can imagine that the triangles three interior angles are supplementary since they also sum to 180 degrees.
Do all right triangles have acute angles?
All right angle triangles have a 90 degree angle and two acute angles that add up to 90 degrees
Do triangles have two obtuse angles?
No. All angles in a triangle must add up to 180 degrees. An obtuse angle is over 90 degrees. So, two obtuse angles would put you at 182 degrees, minimum.
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