alleryA triangle's twelve key lengths include its sides, altitudes, medians and what else?
AAngle bisectors
BCircle diameters
CPerimeter sums
DCircle radii
Answer & Solution
Correct answer: A. Angle bisectors
1. The twelve key lengths are three sides, three altitudes, three medians and three angle bisectors.
2. Together with the three angles they give 95 combinations.
3. Diameters, circumferences and chords belong to circles.
_Source: Wikipedia, Straightedge and compass construction, section Constructing a triangle from three given characteristic points or lengths_
Keep practising Straightedge and Compass Construction
Browse all Straightedge and Compass Construction questions for CTET, or explore more Mathematics topics.
Related questions
Wantzel proved Gauss's condition is necessary for what?Which operation is a common construction that copies a point across a line?Which of these is a ruler-and-compass construction involving a circle?A median splits the opposite side of a triangle into two parts that are what?The angle bisector theorem compares a side's parts with what?The exterior bisector of an angle divides which angle in half?Which lines form the boundaries of Voronoi cells?Which Euclid proposition gives the bisection of a segment by compass and straightedge?