Table of Contents
What is the exterior angle of a triangle always equal to?
180º
An exterior angle of a triangle is equal to the sum of its two opposite non-adjacent interior angles. The sum of the exterior angle and the adjacent interior angle that is not opposite is equal to 180º.
Which triangle is always acute?
equilateral triangle
An acute triangle is a triangle in which each angle is an acute angle. Any triangle which is not acute is either a right triangle or an obtuse triangle. All acute triangle angles are less then 90 degrees. For example, an equilateral triangle is always acute, since all angles (which are 60) are all less than 90.
In which triangle All angles are acute?
equilateral triangles
Yes, all equilateral triangles are acute angle triangles. It is because an equilateral triangle has three equal angles, i.e. 60° each which are acute angles.
Can the exterior angle of a triangle be a straight angle explain?
No, the exterior angle of a triangle cannot be a straight angle because if the exterior angle is straight then there won’t be any triangle left that would be a straight line.
What is acute angle?
Acute angles measure less than 90 degrees. Right angles measure 90 degrees. Obtuse angles measure more than 90 degrees.
How do you know if a triangle is acute or obtuse?
An acute triangle has three angles that each measure less than 90 degrees. An obtuse triangle is a triangle with one angle that is greater than 90 degrees.
Is the triangle acute right or obtuse?
Vocabulary Language: English ▼ English
| Term | Definition |
|---|---|
| Acute Triangle | An acute triangle has three angles that each measure less than 90 degrees. |
| Obtuse Triangle | An obtuse triangle is a triangle with one angle that is greater than 90 degrees. |
| Right Triangle | A right triangle is a triangle with one 90 degree angle. |
Can a triangle have three acute angles?
An acute triangle (or acute-angled triangle) is a triangle with three acute angles (less than 90°). An obtuse triangle (or obtuse-angled triangle) is a triangle with one obtuse angle (greater than 90°) and two acute angles.