angles

right angle

obtuse angle

acute angle

reflex angle

straight angle

full angle

triangle

acute, obtuse or right triangle (describing it by its angles)

scalene, isosceles, equilateral (descibing it by it sides and angles)

two-dimensional solids

prism, pryamid

polygons

regular or irregular polygon

concave or convex polygon

naming polygons by their sides: triangle, quadrilateral, pentagon, hexagon, octagon

square, rectangle, quadrilateral, trapezoid/trapezium

parallel lines, perpendicular lines

compass, protracgtor

Bonus: rhombus