...one side is perpendicular to another, the angle between them is a right angle, and the triangle is a right-angled triangle. The side opposite the right angle is called the hypotenuse; the other two sides, tho base and perpendicular. Thus, A .BC is a right-angled triangle;...

...called an obtuse-angled triangle. DBF. A triangle which has one of its angles a right angle is called a right-angled triangle. The side opposite the right angle is called the hypotenuse. DBF. A triangle which has all its angles acute angles is called an acute-angled triangle....

...is called an obtuse.angled triangle. A triangle which has one of its angles a right angle is called a right.angled triangle. The side opposite the right angle is called the hypotenuse (a Greek word which means " subtending " the right angle). A triangle which has all its...

...(Also see p. 16.) Right.angled triangle. A triangle which has one of its angles a right angle is called a right.angled triangle. The side opposite the right angle is called the hypotenuse, (p. 35.) Ruler and compass constructions, (pp. 78, 198.) Scalene triangle. A triangle which...

...another, (p. 64.) Right-angled triangle. A triangle which has one of ita angles a right angle is called a right-angled triangle. The side opposite the right angle is called the hypotenuse, (p. 81.) Scalene triangle. A triangle which has no two of its sides equal is called a scalene...

...is called an obtuse-angled triangle. A triangle which has one of its angles a right angle is called a right-angled triangle. The side opposite the right angle is called the hypotenuse. A triangle which has all its angles acute angles is called an acuteangled triangle. In...