Based on the image, identify the geometric shapes and any associated labels or measurements.

The image displays two right-angled triangles drawn on a green chalkboard. Both triangles share a common vertex labeled 'C' at the top and a base on the line segment 'AH'. Below the triangles, there are labels and mathematical expressions. Triangle 1 (left): - Vertices labeled A, B, H, and C. - A right angle is indicated at vertex H. - An angle at vertex A is labeled as 18 degrees. - Text below: 'CH - высота' (CH - height). - Angle BCH is given as 70 degrees. - Angle ACB is asked for, with a question mark. - A number '16' is written above the triangle. - A number '(3)' is written to the right of the triangle. Triangle 2 (right): - Vertices labeled A, B, H, and C. - A right angle is indicated at vertex H. - An angle at vertex A is labeled as 22 degrees. - Text below: 'CH - высота' (CH - height). - Angle BCH is given as 10 degrees. - A number '26' is written above the triangle. - A number '(1)' is written to the right of the triangle. There are also partial labels or drawings of other triangles on the far right, labeled '(1)' and '(2)' . A yellow poster with Russian text and logos is attached to the board below the drawings. The text on the poster includes 'EDUSTRONG', 'УЧЕНИКУ УЧИТЕЛЮ', 'ПОНЯТНО УДОБНО', and 'EDUST'.