# Why Can A Triangle Only Have One Right Angle?

## Can a triangle have one right angle?

A right triangle (American English) or right-angled triangle (British English) is a triangle in which one angle is a right angle (that is, a 90-degree angle).

The side opposite the right angle is called the hypotenuse (side c in the figure)..

## Can a triangle have only one 90 degree angle?

In a right triangle, one of the angles is a right angle—an angle of 90 degrees. A right triangle may be isosceles or scalene. … In an acute triangle, all angles are less than right angles—each one is less than 90 degrees. An acute triangle may be equilateral, isosceles, or scalene.

## Can a triangle have one obtuse angle?

An obtuse triangle (or obtuse-angled triangle) is a triangle with one obtuse angle (greater than 90°) and two acute angles. Since a triangle’s angles must sum to 180° in Euclidean geometry, no Euclidean triangle can have more than one obtuse angle.

## Is it possible to draw a right obtuse triangle?

An obtuse triangle has one angle measuring more than 90º but less than 180º (an obtuse angle). It is not possible to draw a triangle with more than one obtuse angle. … It may be acute, obtuse, equiangular, scalene, isosceles, or equilateral, but not a right triangle.

## Can a triangle have 2 parallel sides?

A triangle can have 2 parallel sides A triangle can have 2 perpendicular sides A quadrilateral can have 2 parallel sides A quadrilateral can have 2 perpendicular sides © Corbettmaths 2018 Page 8 11. Kirsty says that the x-axis and the y-axis are parallel.

## Can 1 acute and 2 obtuse form a triangle?

Types of Triangles. All equilateral triangles are equiangular. … A right triangle will have 1 right angle and 2 acute angles. An obtuse triangle will have 1 obtuse triangle and 2 acute angles.

## How many right angles does a triangle have?

two right anglesIn a Euclidean space, the sum of angles of a triangle equals the straight angle (180 degrees, π radians, two right angles, or a half-turn). A triangle has three angles, one at each vertex, bounded by a pair of adjacent sides.

## What is the greatest number of obtuse angles in a triangle?

Only one. Obtuse angles are greater than 90 degrees, and a triangle has interior angles that equal 180 degrees in total, so any more than one means interior angles greater than 180. Hope this helps!

## Can a triangle have 3 right angles?

No, real, triangle can have three right angles. … The sum of the angles formed must equal 180° and the sum of the length of two sides must be greater than the length of the third. A right angle takes up half of the 180°, so the remaining 90° must be split between the other two angles.

## Do right triangles have equal sides?

A right triangle has one angle equal to 90 degrees. A right triangle can also be an isosceles triangle–which means that it has two sides that are equal. A right isosceles triangle has a 90-degree angle and two 45-degree angles.

## What’s the third side of a triangle?

The hypotenuse is always opposite the right angle and it is always the longest side of the triangle. To find the length of leg a, substitute the known values into the Pythagorean Theorem. Solve for a2.

## Why do triangle angles add to 180?

A triangle’s angles add up to 180 degrees because one exterior angle is equal to the sum of the other two angles in the triangle. In other words, the other two angles in the triangle (the ones that add up to form the exterior angle) must combine with the third angle to make a 180 angle.

## Why does a right triangle have only one right angle?

Since the sum of all angles in any triangle is equal to 180o , so there can be only one right angle if all other angles are to be greater than zero. So the angle C would have to be zero, which is impossible.

## Can a triangle only have one obtuse or right angle?

No, a triangle cannot have an obtuse and a right angle.

## What is the greatest number of right angles in a triangle?

Sum of Angles = 900′. 6 right angles = 540′, leaving 360′, which is impossible. So maximum number is 5.

## Can a triangle have both an acute and right angle?

Question 945360: A triangle cannot have both an acute angle and a right angle? In a right triangle, BOTH of the other angles MUST be acute. An obtuse angle (greater than 90 degrees) would make the sum of the angles greater than 180 degrees, which is impossible.

## Which is the shortest side of right angle triangle?

However, if the angle you already know is the medium one, then the shortest side is adjacent to it. The hypotenuse is always the longest side in a right triangle because it is opposite of the largest angle, the ninety degree angle. Comment on Charlotte Auen’s post “The shortest side is the one opposite the smallest…”

## Can a triangle have 2 right angles?

No, a triangle can never have 2 right angles. A triangle has exactly 3 sides and the sum of interior angles sum up to 180°. … Thus, it is not possible to have a triangle with 2 right angles.