Math II · G-CO.10

Prove triangle theorems including angle sum, isosceles base angles, midsegment theorem, and medians concurrence.

Prove triangle theorems including angle sum, isosceles base angles, midsegment theorem, and medians concurrence.

Concept Geometry

Domain Congruence

Problem Types

Problem Templates In This Objective

9 problem types are attached to this objective. The full web app handles practice, answers, hints, and walkthroughs.

Template 1

Find a missing interior angle in a triangle using the 180° angle sum

4 variants

Template 2

Find a triangle's exterior angle from the two remote interior angles

4 variants

Template 3

Find specified angles in an isosceles triangle

4 variants

Template 4

Use the converse of the isosceles triangle theorem to conclude two sides are equal

4 variants

Template 5

Find missing side lengths using the triangle midsegment theorem

4 variants

Template 6

Classify a segment using the median definition

4 variants

Template 7

Find named centroid subsegments and the whole median

4 variants

Template 8

Complete a structured triangle-theorem reasoning chain

4 variants

Template 9

Choose the triangle theorem needed for a problem

4 variants