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Because the formula for finding the total sum of interior angles for any polygon is:

(number of sides-2)*180 = total sum of interior angles

A triangle has three sides so: (3-2)*180 = 180 degrees

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Q: Why can't a triangle have sum of the angles more than 180 degrees?
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Which cant be the measure of a triangle?

The 3 interior angles of a triangle add up to 180 degrees no more and no less


When all angle in a triangle measure axactly 90 degrees?

It cant be possible because a triangle only consists of 180 degree angles !! As 90 + 90 = 180 thus 2 or more than 2 angles in a triangle cant be right angles i.e. 90 degree :D


How many angles are more than 90 degrees on a straight triangle?

Assuming the question is in relation to inner angles of a triangle, then there can only be one angle exceeding 90 degrees: because all inner angles in a triangle add up to 180 degrees, and because there are exactly three inner angles in a triangle, the can only be one of 90 degrees or more.


Can a triangle have more than two right angles?

I would have to say no. A triangle can't have more than one right angle to begin with. If it had 2 right angles, then it is no longer a triangle. The angles of the triangle have to add up to 180 degrees and a right angle is 90 degrees. So if you had two right angles you would already be at 180 degrees.


Is it possible for a triangle to have two right angles?

yes it is possible there are many different ways to draw a triangle the right angled triangle is one of them :) hope i helpedI'm sorry for the previous answer but it is wrong, it is impossible for a triangle to have more than two 90 degree angles. A triangle has 180 degrees in total, so if you have two right angle triangles they would equal 180 degrees and your third angle would have 0 degrees which is impossible.So no you cant have 2 right angles in a triangle

Related questions

Which cant be the measure of a triangle?

The 3 interior angles of a triangle add up to 180 degrees no more and no less


When all angle in a triangle measure axactly 90 degrees?

It cant be possible because a triangle only consists of 180 degree angles !! As 90 + 90 = 180 thus 2 or more than 2 angles in a triangle cant be right angles i.e. 90 degree :D


Why does a triangle have two acute angles?

If there were less than two acute angles, there would be two (or more angles that were 90 degrees or more. Then the sum of the three angles of the triangle would be more than 180 degrees. But this is not possible because the interior angles of a triangle sum to 180 degrees.


Why cant a triangle have more than 1 obtuse angles?

Because the 3 interior angles of any triangle always add up to 180 degrees. And so it follows that 2 obtuse angles would add up to over 180 degrees.


How many angles are more than 90 degrees on a straight triangle?

Assuming the question is in relation to inner angles of a triangle, then there can only be one angle exceeding 90 degrees: because all inner angles in a triangle add up to 180 degrees, and because there are exactly three inner angles in a triangle, the can only be one of 90 degrees or more.


Can a triangle have 2 obtuse angles?

No. The sum of the internal angles of a plane triangle is 180 degrees. If one of the angles is 90 degrees or more, this leaves 90 degrees or less to be distributed between the other two angles which will then both be acute.No because 2 obtuse angles would measure over 180 degrees and the 3 angles of any triangle add up to 180 degrees.


Can a triangle have more than two right angles?

I would have to say no. A triangle can't have more than one right angle to begin with. If it had 2 right angles, then it is no longer a triangle. The angles of the triangle have to add up to 180 degrees and a right angle is 90 degrees. So if you had two right angles you would already be at 180 degrees.


Is it possible for a triangle to have two right angles?

yes it is possible there are many different ways to draw a triangle the right angled triangle is one of them :) hope i helpedI'm sorry for the previous answer but it is wrong, it is impossible for a triangle to have more than two 90 degree angles. A triangle has 180 degrees in total, so if you have two right angle triangles they would equal 180 degrees and your third angle would have 0 degrees which is impossible.So no you cant have 2 right angles in a triangle


What is one way obtuse triangle and acute triangle different?

Acute Angles: Less 90 degrees but more than 0 degrees. Obtuse Angles: More than 90 degrees but less than 180 degrees.


What is a triangle with all angles measuring greater than 90 degrees?

there can be only one angle measuring more than 90 degrees.. as sum of angles in a triangle is 180 degrees. all the angles cannot exceed 90. A triangle in which one angle is greater than 90 degrees is an obtuse angled triangle


Can a triangle have more then one right angle?

No. All three angles inside a triangle add up to 180 degrees. If a triangle had two right angles, then those two angles alone would add up to 180 degrees, and there would be no more degrees left to make the third angle with.


Can a triangle have all angles more than 60?

No because the 3 interior angles of a triangle add up to 180 degrees