| Task | Comment | Grade |
|---|---|---|
| 1. Three Altitudes | In the last picture, a triangle is highlighted, but the height is not highlighted. And the task about heights. It was their color or thickness that should be highlighted (highlighted). Moreover, the heights of the obtuse triangle should have been shown. If not by animation, then by another drawing. Altitudes should have been shown as segments AF, CD, BE and not as straight lines. | 1✅/1.6 |
| 2. Altitude, bisector, and median | It was necessary to build not all heights, medians, bisectors, but only one and from one peak. | 0.8 /1.6 |
| 3. Medivan triangle | The triangle itself is built correctly. But the triangle should have been highlighted more clearly. It was necessary to demonstrate that the points M1, M2, M3 form exactly the medians, not with numerical marks, but with corresponding serifs on equal segments. | 1.3✅/1.6 |
| 4. Orthic triangle | The triangle is also constructed correctly, but not clearly highlighted. In a weak color. In addition, the heights themselves should have been depicted, in a weak gray color, or with a dotted line. Indicate that these angles are exactly 90. First, the triangle DFE is shown, the points of which are black (dark gray), so these are dependent points and we can assume that these are the bases of the heights. Then (a yellow triangle) is demonstrated, which is simply drawn - since the points are blue. This is not a triangle built on the bases of the heights | 0.8 /1.6 |
| 5. Incircle triangle | The triangle should have been clearly highlighted, by color or thickness. Demonstrate that points D,E,F are the bases of the bisectors. It would have been better not with numerical values, but with the corresponding angle labels (or colors). There are no labels on the last picture - how to find out which triangle it is? | 1.3✅/1.6 |
| 6. Tree triangles | Point M is common to all triangles - this cannot be (only as a special case when three points coincide) - moreover, it is blue - and therefore it is constructed arbitrarily, and not as a result of construction. and it seems that the entire yellow triangle is constructed arbitrarily, and not on the bases of the heights. | 0.5/2 |
Total: 5.7 / 10