...angles with each other. 21. An Acute Angle is one which is less than a right angle; as angle a. 22. An Obtuse Angle is one which is greater than a right angle; as angle ABC. -о ELEMENTS OF PLANE GEOMETRY. 23. oblique Linea are lines which are not perpendicular...

.... acute and obtuse. 10. An Acute Angle is one which is less than a right angle, as the angle A. 11. An Obtuse Angle is one which is greater than a right angle; as, the angle C, or the angle ACD above. 12. Angles, like other quantities, may be added to, or subtracted from,...

...one another, then these angles are called right angles, and AB is said to be perpendicular to CD. 11. An obtuse angle is one which is greater than a right angle. Thus A is an obtuse angle. A 12. An acute angle is one which is less than a right angle. Thus B is...

...is equal to its supplement. xv. An acute angle is one which is less than a right angle, as A. D xvI. An obtuse angle is one which is greater than a right angle, as BAC. The supplement of an acute angle is obtuse, and conversely, the supplement of an obtuse angle...

...Euclid's language : for instance, what is your Definition of an obtuse angle ? ' NIEMAND reads. P. 8. Def. 13. ' An obtuse angle is one which is greater than a right angle.' Mm. So you tumble headlong into the very first pitfall you come across ! Why, that includes such angles...

...to be the Complement of the other. 69. An Acute Angle is one which is less than a right angle. 70. An Obtuse Angle is one which is greater than a right angle, but less than a straight angle. or, in one plane, the whole amount of angle round a point, is called...

...to be the Complement of the other. 69. An Acute Angle is one which is less than a right angle. 70. An Obtuse Angle is one which is greater than a right angle, but less than a straight angle. or, in one plane, the whole amount of angle round a point, is called...

...Angles. All angles which are not right angles are oblique. Oblique angles are either obtuse or acute. An Obtuse Angle is one which is greater than a right angle. Thus, a is an obtuse angle. An Acute Angle is one which is less than a right angle. Thus, b is /£...

...Two RIGHT ANGLES. OBTUSE ANOLB. ACDTI Ami* An Acute Angle is one which is less than a right angle. An Obtuse Angle is one which is greater than a right angle. The sides of an angle are the lines forming it, and the vertex of an angle the point of their meeting....

...505. A Right Angle is an angle formed by the meeting of a horizontal line and a perpendicular line. ' An obtuse angle is one which is greater than a right — angle. An acute angle is one which is less than a right angle. 506. A Surface is that which has length angi"se...