Extend all the lines of a right-angled triangle with sides of 3, 4 and 5 units.
The extension of the lines forming the right angle will produce 3 other right angles.
The extension of the lines forming the other two angles will produce 6 other angles.
This gives a total of 12 angles, 4 of which are acute, 4 right and 4 obtuse.
Acute, obtuse, or 90 degree (right) angles.
Or right angles. Or, technically, straight angles as well
acute and obtuse.
Vertical angles can be acute, right (if the intersecting lines forming them are perpendicular) or obtuse.
intersecting lines * * * * * Non-perpendicular intersecting lines. Or else the angles would be right angles.
intersecting lines * * * * * Non-perpendicular intersecting lines. Or else the angles would be right angles.
It can have 0 or 2 right angles, 1 or 2 acute or obtuse angles.
there are 4 types of common angles. right, obtuse, acute, and straight.
A rectangle has no acute angles and no obtuse angles. It has 4 right angles.
Angles are usually illustrated as two acute and two obtuse, but there can be two right, one acute and one obtuse. Angles cannot be parallel since that is a characteristic of lines, not angles!
No shape does. If it has 4 sides and one pair of parallel lines it cannot have only 1 right angle, it must either have: 1) 2 right angles, 1 acute acute and 1 obtuse angle; or 2) no right angles, 2 acute angles and 2 obtuse angles; in which case it would be a trapezium (trapezoid).
A trapezoid contains either:two acute angles and two obtuse angles orone acute angle, one obtuse angle and two right angles.