An AI geometry tutor you can draw with

Two parallel lines are crossed by a transversal. One angle is 65°. Find angle $x$, which is on the opposite side of the transversal, between the parallel lines.

1. The tutor asks you to sketch the lines and mark the 65° angle.
2. "Which pair of angles are these: corresponding, alternate or co-interior?" You identify them as alternate angles.
3. Alternate angles are equal, so $x = 65°$.
4. It checks your written reason, because many tests give marks for the reason as well as the answer.

A ladder 5 m long leans against a wall with its foot 3 m from the wall. How high up the wall does it reach, and what angle does it make with the ground?

1. Sketch the right triangle: the ladder is the hypotenuse (5 m), the ground is 3 m.
2. Pythagoras: $h^2 + 3^2 = 5^2$, so $h^2 = 16$ and $h = 4$ m.
3. Angle with the ground: $\cos\theta = \dfrac{3}{5}$, so $\theta \approx 53.1°$.

The tutor asks you to label the sides relative to the angle first (opposite, adjacent, hypotenuse), which is where most trigonometry mistakes start. See our topic guide on right-triangle trigonometry.

Tell the tutor what your course covers; we don't claim full coverage of any curriculum.

Proofs ask you to explain why something must be true, with a reason for every step. The tutor helps you plan before you write: what do you know, what do you need to show, and which facts connect them? Then it checks each statement has a valid reason ("vertical angles are equal", "angles in a triangle add up to 180°") and asks you to fill any gaps.

Knowing a formula isn't enough; you need to know which one fits. The tutor asks you to identify the shape and what you're finding before choosing a formula, and it reminds you of units (cm, cm², cm³). For the formulas given on the SAT and the ones to memorise, see SAT Math formulas; for GCSE, see GCSE Maths formulas.

The tutor works from what you draw and type. If a question depends on a diagram in your textbook, sketch it or describe it carefully, including any lengths and angles. Like any AI it can make mistakes, so check important answers against your notes or with your teacher.