Question

This point lies inside a triangle if and only if all of its angles are acute. For 10 points each:
[10m] Name this point denoted “H” that is found at the intersection of the three altitudes of a triangle.
ANSWER: orthocenter
[10h] Along with the centroid and circumcenter, the orthocenter is used to define this construct. This construct is ill-defined for equilateral triangles because all three points coincide.
ANSWER: Euler line
[10e] The Euler line coincides with the line of symmetry in these triangles, which have exactly two sides with the same length.
ANSWER: isosceles triangles
<Other Science>

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Summary

2024 ACF Fall at CornellfallY911.11100%0%11%
2024 ACF Fall at Ohio StatefallY813.7575%50%13%
2024 ACF Fall at WashingtonfallY611.67100%17%0%
2024 ACF Fall at GeorgiafallY1112.73100%27%0%
2024 ACF Fall at North CarolinafallY1012.00100%20%0%
2024 ACF Fall at Claremont CollegesfallY522.00100%80%40%
2024 ACF Fall at RutgersfallY816.25100%50%13%
2024 ACF Fall at IllinoisfallY913.33100%33%0%

Data

Claremont AClaremont B1001020
Claremont CUSC10101030
UCLA BUCLA A1001020
UCLA DUCLA C001010
UCLA EUCSD10101030