Slab A climbing wall that's typically vertical or slightly less than-thinkobtuse angles from geometry class.

Bunny turns and sees a tall, lean-looking figure standing, like a tower of obtuse angles, in the shadows.

Each of the four solid angles in this figure is a little larger than the largest of obtuse angles.

It completed a full circle, then dropped to the floor where it sprawled, arms and legs pointing upward at obtuse angles.

It will be observed that the limbs are then generally slightly bent, so that they form very obtuse angles to each other.

"Ah," O'Farrell said, "they laugh at it because I have to change Vioget's acute and obtuse angles.