Some articles on acute angle, angle:
... Case of acute angle γ, where a > 2b cos γ ... The tangent h forms a right angle with the radius b (Euclid's Elements Book 3, Proposition 18 or see here), so the yellow triangle in Figure 8 is right ... Case of acute angle γ, where a < 2b cos γ ...
Famous quotes containing the words angle and/or acute:
“It is a mistake, to think the same thing affects both sight and touch. If the same angle or square, which is the object of touch, be also the object of vision, what should hinder the blind man, at first sight, from knowing it?”
—George Berkeley (16851753)
“Long before I wrote stories, I listened for stories. Listening for them is something more acute than listening to them. I suppose its an early form of participation in what goes on. Listening children know stories are there. When their elders sit and begin, children are just waiting and hoping for one to come out, like a mouse from its hole.”
—Eudora Welty (b. 1909)