A right triangle because the 90 degree angle creates a corner.
It is a right angle triangle because it has a 90 degree angle and the 3 angles add up to 180 degrees.
45 degrees is an angle, not a triangle.A triangle containing an angle of 45 degrees can be any kind of triangle except an equilateral triangle.
A right-angle triangle.
A triangle that measures less than 90 degrees is called an acute triangle. In an acute triangle, all three interior angles are less than 90 degrees. This property distinguishes it from right triangles, which contain one angle equal to 90 degrees, and obtuse triangles, which have one angle greater than 90 degrees.
sumplementary
A right angle triangle and the third angle measures 60 degrees
An obtuse angled triangle.
An obtuse triangle.
It is a right angle triangle because it has a 90 degree angle and the 3 angles add up to 180 degrees.
It will be an obtuse or an isosceles triangle which would look like a straight line
45 degrees is an angle, not a triangle.A triangle containing an angle of 45 degrees can be any kind of triangle except an equilateral triangle.
A right-angle triangle.
It is a right angle triangle because the 3rd angle is 90 degrees
The third angle must be 30 degrees so it is an obtuse triangle
Acute
sumplementary
An obtuse angle