Across
- 3. - a branch of mathematics concerned with relationships between angles and side lengths of triangles.
- 4. - a trigonometric function that is equal to the ratio of the side opposite a given angle (in a right triangle) to the hypotenuse.
- 5. - a triangle that does not contain a right angle (90 degrees).
Down
- 1. - a polygon with three corners and three sides, one of the basic shapes in geometry.
- 2. - a trigonometric function that is equal to the ratio of the side adjacent to an acute angle (in a right-angled triangle) to the hypotenuse.