In isosceles (and equilateral) triangles, a segment drawn from the vertex angle to the opposite side is the altitude, angle bisector and median. Isosceles triangle properties are used in many proofs and problems where the student must realize that, for example, an altitude is also a median or an angle bisector to find a missing side or angle.

### Sage burning kit

Mathematics 4020 Core Activity Below are some objectives from the Common Core State Standards for Elementary Mathematics. Can you identify the grade levels? Standard Grade level 1. Understand units of liquid volume and mass. 2. Distinguish between deﬁning and non-deﬁning attributes of shapes. 3. Make histograms. 4. Know what a hexagon is. 5.