Math Drills Mental Arithmetic vs Triangle Sketch

Build faster mental math skills with quick daily drills. Math Drills covers addition, subtraction, multiplication, and division with grade-friendly practice sets—no account required. Review mistakes in the wrong book, track practice history, unlock achievements, and create custom problem sets for homework or exam prep. Clear stats help students and parents see progress over time. Offline-first by design: your practice data stays on your device, with no login, no tracking, and no ads.

Triangle Sketch is a hands-on geometry tool for drawing and exploring triangles. Draw a triangle with your finger, check its measurements, edit side lengths and angles, move vertices, enter coordinates, and view useful triangle facts. Triangle Sketch helps students see how triangle measurements connect instead of only reading formulas. Features: • Draw triangles directly on a graph • Edit side lengths, angles, and vertex coordinates • Work with any triangles and right triangles • View area, perimeter, triangle type, height, centroid, incircle, and circumcircle • Use right-triangle trig tools • Change units, decimals, colors, grid snapping, and display options • One-time hints help students discover important tools Triangle Sketch is designed for students, teachers, and anyone learning geometry.