Euclid's element?: Abbr., 4 letters
Euclid's forte: abbr., 4 letters
It's got a lot of angles: Abbr., 4 letters
Math branch, briefly, 4 letters
Math class taken after algebra, often: Abbr., 4 letters
Math subj. with angles, 4 letters
Points are discussed in it: Abbr., 4 letters
Study of figures: Abbr., 4 letters
Subj. with circles and such, 4 letters
Environmental extremist?, 9 letters
Certain mathematicians, 9 letters
Kind of progression, 9 letters
Fruit cut in linear shapes?, 15 letters
9 + 3 + 1 + 1/3 + 1/9 +..., e.g., 15 letters
There is no royal road to ___: Euclid, 8 letters
Branch of mathematics that sounds like what a grown-up acorn would say, 8 letters
High school subject, 8 letters
Skill that helped in early navigation, 8 letters
The pure mathematics of points and lines and curves and surfaces, 8 letters
Construction sites, 15 letters
Where to find compass directions?, 15 letters
Midlevel math course, 10 letters
Pythagorean theorem learner, 15 letters
Some mathematicians: abbr., 5 letters
4, for 2 and 8, e.g., 11 letters
A mathematician specializing in geometry, 12 letters
Slender-bodied broad-winged moth whose larvae are called measuring worms, 9 letters